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SRI Instruments Documentation
SRI Instruments GC and data system literature, manual sections, product descriptions, specifications, application notes, and papers
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| GC Innovations Product Descriptions (Color) | |
10 and 20 position GreenhouseGas vial autosamplers(6.81 MB)Instructions for the 10 and 20 position gas vial autosamplers used with Greenhouse Gas samples |
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EPA Method 25 ( oxidize/reduce ) GC configuration(11.02 MB)This GC converts all the hydrocarbons in the sample ( plus CO and CO2 ) to methane for an accurate carbon count regardless of the hydrocarbon identity. It is a preferred way of measuring air emissions |
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Ultra Compact Model 110 GC for chlorinated VOCs at ppb level(548.98 KB)This document showcases SRI's smallest GC which in this case is configured to detect chlorinated VOCs at the ppb level. |
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EPA Method 16A GC configuration ( Total Sulfur as SO2 )(400.22 KB)This doc explains the Method 16A GC configuration for measuring total sulfur by converting it to SO2 and then measuring the SO2 with a FPD detector. |
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Environmental Testing Solutions(780.62 KB)GCs for environmental testing (e.g., BTEX+) |
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Capillary FID GC(641.64 KB)Low-cost GC perfect for hydrocarbon analysis |
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Model 88 miniature gasless Methane/non-Methane GC(1.16 MB)This document shows the Model 88 miniature gasless GC for methane/non-Methane testing. It has a built in hydrogen generator and air compressor so no gas is needed. |
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Model 310 Educational GC Family(1.48 MB)Overview of our educational FID and TCD GCs, with "Gas-less" options. |
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Mudlogging GC(620.57 KB)A portable, rugged, low-cost GC for mudlogging. Available in rack mount chassis. |
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Multiple Gas Analyzer #1 GC(453.68 KB)Brief overview of the MG #1 configuration. For more information, read the document on the MG #1 GC configuration in the Preconfigured GC Systems section. |
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Sulfur in Natural Gas GC(94.04 KB)GC used to detect sulfur in natural gas. |
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Model 30 TCD Mini GC(467.44 KB)Very low cost, highly portable, mini GC with a packed coulmn and a TCD detector |
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Miniature hydrogen generator(1.48 MB)This sales flyer shows the minature H2-100mini hydrogen generator |
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2022 Pricelist in Excel xls format in a zip file(66.78 KB) |
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2022 Pricelist in pdf format(262.99 KB) |
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310MM Cannabis and Hemp Testing GC Sales Flyer(361.80 KB)This one page sales flyer highlights the main features of the 310MM Cannabis and Hemp Testing GC. |
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Greenhouse Gas GC 456KB(455.33 KB)Brief overview of the Greenhouse Gas GC |
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310MM Edibles Cannabis and Hemp Gas Chromatograph(7.72 MB)This document explains how the 310MM Edibles Cannabis and Hemp Gas Chromatograph functions to make testing cannabinoids in MCT/Olive oils, as well as flower, simpler and less time consuming. |
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| Preconfigured GC Systems | |
Multiple Gas Analyzer #2 GC (MG#2)(674.22 KB) |
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Multiple Gas Analyzer #3 GC (MG#3)(2.19 MB) |
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Multiple Gas Analyzer #3 + Sulfur GC(1.22 MB) |
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MultipleGas#5 operating instructions(8.23 MB)This document was updated October 2022 to reflect recent improvements to the MG5 GC configuration |
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Typical MG5 chromatograms using H2 and Argon carrier gas(1.65 MB)These chromatograms compare the peaks using H2 and also Argon carrier gas. |
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MultipleGas#5 Reproducibility Test(1.10 MB)These chromatogram show the reproducibility of methane and CO at 1% each on the MG5 GC |
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Ethylene Oxide Monitoring GC System(920.93 KB) |
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Oxygenates and Aromatics in Gasoline(729.57 KB)This document describes a GC configuration which measures the oxygenates ( methanol, ethanol etc ) in gasoline similar to ASTM 4815, and also measures Aromatics in gasoline ( Benzene, Toluene etc ) similar to ASTM 3606 but simplified due to SRI's unique ASD ( Aromatic Selective Detector ). |
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ASTM 4815 Oxygenates in Gasoline GC operation(3.43 MB)This document explains the operation of the SRI GC configured for ASTM 4815. |
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Method 16B GC(2.56 MB) |
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Educational TCD GC(166.22 KB) |
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Environmental/BTEX GCs(441.98 KB) |
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Multiple Gas Analyzer #1 GC (MG#1)(424.85 KB) |
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| Hydrogen Generators | |
H2-100 mini hydrogen generator flyer February 2022(1.48 MB)This flyer shows the miniature version of the H2-100 hydrogen generator. |
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H2-100mini operation manual(9.50 MB)This is the manul for the H2-100mini hydrogen generator |
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H2-100 Hydrogen Generator Manual(9.64 MB)This document is the manual for the H2-100 Hydrogen Generator |
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| Quick Start instructions | |
Model 333 Data System Quick Start(1.88 MB) |
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Model 203 Data System Quick Start(448.77 KB) |
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GC Quick Start(855.87 KB) |
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Model 302 Data System Quick Start(794.22 KB) |
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Model 202 Data System Quick Start(482.87 KB) |
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Model 30 Mini GC Quick Start(1.80 MB) |
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Sulfur in Natural Gas GC Quick Start(1.16 MB) |
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| GC Detectors | |
FPD - Flame Photometric Detector(248.94 KB) |
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NPD - Nitrogen/Phosphorus Detector(436.82 KB) |
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NPD Adjustment(346.09 KB)Instructions of adjusting the NPD bead voltage for optimal sensitivity/longevity of the bead |
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NPD to FID Detector Conversion(3.41 MB)Instructions on converting an NPD to an FID |
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FID to NPD conversion kit(3.24 MB)This document shows the proceedure to convert from FID to NPD and back. |
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TID - Thermionic Ionization Detector(5.11 MB) |
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NPD whitepaper from DET(218.44 KB)This publication from DET ( manufacturer of the NPD bead ) is very informative. |
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ECD - Electron Capture Detector(334.01 KB) |
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ECD Detector Removal and Replacement(1.44 MB)Important information on how to remove and replace the ECD |
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Detection limit of SRI dual FPD+FID 3 way detector(4.69 MB)These chromatograms show the detection of sulfur at 1ppm and phosphorus at 1ppb using the dual FPD+FID detector |
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ECD Safety Data Sheet 11-27-2017(151.62 KB)This is the safety data sheet document from NRD for the SRI ECD detector. |
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UN 1210 Shipping Regulations for ECD detector(965.22 KB)These are the regulations which cover the ECD detector. |
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HID - Helium Ionization Detector(248.91 KB) |
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TCD - Thermal Conductivity Detector part 1(320.44 KB)Function and applications of the Thermal Conductivity Detector (TCD) |
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TCD - Thermal Conductivity Detector part 2(234.89 KB)Troubleshooting for the Thermal Conductivity Detector (TCD) |
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Single Filament TCD(636.18 KB) |
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PID - Photo Ionization Detector(321.80 KB) |
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PIDLampDataSheet(339.71 KB)The data sheet from one of the PID lamp manufacturers is a useful reference. |
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DELCD - Dry Electrolytic Conductivity Detector(302.22 KB) |
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Servicing the DELCD(1.70 MB)This document shows how to remove and adjust the probe part of the DELCD |
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FID - Flame Ionization Detector(1.14 MB) |
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RGD - Reduction Gas Detector(390.46 KB) |
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Large Capacity Methanizer Installation(1.17 MB)This documents describes the replacement of the 1/8 inch in-jet methanizer with the large capacity 1/4" methanizer |
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CCD - Catalytic Combustion Detector(814.44 KB) |
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ASD - Aromatic Selective Detector(1.13 MB) |
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RGD Operation(893.84 KB) |
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| GC Injectors | |
Purge and Trap part 2(302.95 KB) |
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Heated Static Headspace Injector(221.31 KB) |
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PTV - Programmable Temperature Vaporization(748.49 KB) |
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On-Column PTV Injector (OCPTV)(259.43 KB) |
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SPME Injection(198.68 KB) |
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8640 Integrated Autosampler(306.76 KB) |
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5030 Autosampler Retrofit(49.34 KB) |
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5030 Autosampler Relay Board Installation(119.81 KB) |
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Thermal Desorber(419.69 KB) |
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Column Installation (on column)(979.36 KB) |
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NPD Equipment Summary(218.44 KB) |
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TOGA Permeation Tube Operation(847.49 KB) |
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Purge and Trap part 1(217.79 KB) |
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Bandolero Exetainer Autosampler operation(1.68 MB)This document shows the operation of the 100vial Bandolero 12ml vial ( Exetainer ) autosampler connected to a SRI GC. |
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Column Installation (heated injector)(1,012.26 KB) |
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| Valves | |
Valve Diagram Collection(6.31 MB)This document contains a selection of 10 port gas sampling valve diagrams, plus one and dual valve blank diagrams so you can configure your own valve plumbing. Also included is a table of tube volumes for different ID tubing which is helpful when calculating how much tubing to cut when making or replacing the loop. |
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Gas Sampling Valve Diagram, Triple(104.53 KB) |
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Tubing volume chart shows volumes/inch of various size tube(736.59 KB)UYse this chart to make gas sampling loops of any size. |
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Gas Sampling Valve Types May 2019(835.96 KB)This document shows the various different gas sampling valves and actuators used in SRI GCs. |
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Valco 22 Port 10 Stream Selector Valve(719.96 KB) |
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MultipleGas#5 Valve diagram(226.77 KB)This diagram is what is printed on the MG5 valve oven's lid |
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Valco Actuator Manual(897.97 KB)Manufacturer's manual of the Valco Actuator |
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Valco Actuator Connections(208.55 KB) |
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Gas Sampling Valve Installation, 8610C(9.40 MB) |
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Replacing The Circuit Board Inside Electric Valve Actuator(913.07 KB) |
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Installation of 24volt DC Valco Valve Actuators(928.72 KB)This document explains some of the difference in the mounting of the newer 24volt actuator compared to the older style actuators. |
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Valco Universal Actuator Manual 2-27-2019(405.09 KB)Thiks is Valco's manual for the new stepper motor type valve actuators we use in SRI GCs for 2 and 10 position valves. |
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Supplemental power supply for AFP valves(831.40 KB)This document describes the installation of a supplemental power supply for AFP valves. |
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ASD valve actuator manual(1.64 MB)This document from ASD describes the operation of the ASD electric valve actuator. |
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Multiple Gas Analyzer #3 Valve Diagram, with on-column injection modification(139.00 KB) |
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AFP Actuator Board types and wire connections January 2022(3.39 MB)This document shows the various board revisions and wire connections for the AFP valves used by SRI |
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Replacing the circuit board in AFP valves(1.52 MB)This document shows how to replace the circuit board in AFP gas sampling valves |
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AFP Valve/Actuator Diagram August 2019(1.62 MB)This document shows the current AFP valve used in some SRI GCs |
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AFP Valve Head Specs(822.69 KB)This doc shows the AFP valve head with temperature limits, materials of construction etc. |
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Silicone Loop Tubing for On-line liquid sampling(3.25 MB)This document explains how to install and use a silicone tube loop which is useful for measuing many molecules in a water matrix. |
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Greenhouse Gas GC 10 vial Autosampler(3.92 MB)This document explains how to insall the 10 vial autosampler |
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Gas Sampling Valve Diagram, Single(46.20 KB) |
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Gas Sampling Valve Diagram, Dual(91.88 KB) |
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| Cobra 120 Vial Liquid Autosampler | |
COBRA Autosampler Manual(502.67 KB)Manufacturer's manual on the COBRA Autosampler |
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COBRA 8610V Operation(2.78 MB) |
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COBRA 8610C Mounting(2.83 MB) |
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Cobra-HTA Liquid Autosampler interface board(158.62 KB)This drawing shows the jumper connections to convert the Cobra interface board to HTA. |
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AS120 Liquid Autosampler control program and Manual(112.23 MB)This zip file contains theWinodws 10 program to control the AS120 120 vial liquid autosampler and the operation manual. Its current as of 8-25-2021 |
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| PeakSimple Data Systems and Software | |
Basic PeakSimple Features(1.33 MB) |
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Model 302 USB Driver Installation(408.67 KB) |
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Advanced PeakSimple Features(1.42 MB) |
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PeakSimple Calibration(762.83 KB) |
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Internal Standard Calibration, in v. 3.51(726.90 KB) |
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Using PeakSimple Events (Event Tables)(306.71 KB) |
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Model 302 6 Ch. USB Data System Quick Start(794.22 KB) |
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Using PeakSimple's Autosampler Queue(613.30 KB) |
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Copying Results Data from PeakSimple to Excel(311.92 KB)This document describes the proceedure for copying results data from PeakSimple to Excel/Word or other Windows programs. |
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Utilizing Multiple Instances in PeakSimple(292.13 KB) |
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New End of Run E-Mail Feature(193.43 KB) |
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User Calculations(55.93 KB)This document explains how to use the user calculations feature in Peaksimple |
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Enabling Pressure Programming on GC(578.56 KB) |
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Python control of PeakSimple(879.66 KB)The zip file details how to control PeakSimple from Python software. |
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Model 333 1 Ch. USB Data System Quick Start(946.37 KB) |
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PeakSimple Update Tips(98.57 KB) |
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PeakSimple Debug Mode(186.34 KB) |
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Wits Output from PeakSimple(3.47 MB)This document explains how to get PeakSimple to output data to a WITS receiver. |
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PeakSimple Control Code Examples(27.24 KB) |
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4-20 Milliamp output from PeakSimple(1.92 MB)This dicument describes how to implement the 4-20 milliamp output. |
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PeakSimple Remote Control via External Program(162.45 KB) |
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File Types used by PeakSimple(47.79 KB) |
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USB to Serial Adapter(582.24 KB) |
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Model 202 4 Ch. Serial Data System Quick Start(482.87 KB) |
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Communication Loss (New DLL) pt.1(527.38 KB) |
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Communication Loss pt. 2(581.90 KB) |
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333 Reinitializations Feb 2019(570.91 KB)This doc describes how to modify the 333 A/D board to reduce the number of spontaneous re-initializations. |
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USB Port Grounding(289.36 KB) |
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Validation(934.29 KB) |
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Self Validation Files(12.22 KB)These files allow the user to self-validate PeakSimple data systems |
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Model 302 Data System Manual(822.11 KB) |
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PeakSimple Model 302 6 channel data system changes August 2018(319.48 KB)This document shows the new box for the Model 302 data system |
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Model 203 1 Ch. Serial Data System Quick Start(448.77 KB) |
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Windows 10 Driver Troubleshooting(57.97 KB) |
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PeakSimple drivers for various operating systems(134.96 KB)This doc from Lawson Labs explains which dll,sys, cat and inf files are needed for the various Windows operating systems |
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| Mudlogging GCs | |
Mudlogger Data Logger Mode(445.12 KB) |
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Mud-logger GC(758.39 KB) |
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Mudlogger Operation(2.97 MB) |
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Mudlogging GC Total Gas Calibration(1.57 MB) |
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Mass Flow Controller Option for Mudlogging GC System(652.33 KB) |
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One-Minute Mudlogger Analysis(58.77 KB) |
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Fast Mudlogging Kit Installation(1.32 MB) |
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Mudlogger Auto-ranging Feature(1.07 MB) |
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Mudlogger Auto-ranging Feature June 2016(1.07 MB) |
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Operating Mudlogger GC With Hydrogen Generator(126.24 KB) |
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| GC Accessories | |
Liquid Autosampler Operation(2.78 MB) |
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Automatic Calibration System(442.72 KB) |
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Vaporizer for LPG(766.69 KB) |
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Sample Stream Dryer(565.00 KB) |
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H2 Snubber(817.27 KB)This document explains the "snubber" for H2 and other flammable gases. |
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H2-100 Hydrogen Generator(2.17 MB) |
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Gas Tight Syringe kit January 2018(153.89 KB)This document shows the type of gas tight syringes commonly used with SRI GCs |
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Methanizer(48.94 KB) |
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Stand-Alone Methanizer Accessory(155.77 KB) |
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Model 760 Vacuum Pump(1.39 MB)This document describes the Model 760 Vacuum Pump which is now supplied as part of the Vacuum Pump interface inside SRI GCs. |
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10 Position Greenhouse Gas GC Autosampler(1.34 MB) |
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Bandolero Interface to SRI GC diagram(3.35 MB)This shows the connection from the GC interface board to control the Bandolero vial asutosampler. |
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Bandolero Gas Autosampler(424.04 KB) |
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Bandolero Interface to SRI 8610C GC(1.87 MB)This document shows the electrical connections between a Bandolero autosampler and the SRI GC |
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| Maintenance | |
Using soft graphite ferrules(851.68 KB)This document explains how to "pre-squish" soft graphite ferrules to get the best possible seal when the ferrules are too long to easily connect to Swagelok threads. |
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Replacing the oven fan motor in SRI 8610 and 310 GCs(4.03 MB)The document shows the procedure to replace the oven fan motor. |
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Packing the GC for Shipment(977.65 KB)This document describes how to properly pack your Gas Chromatograph for shipment |
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8610C Manual Part 5(10.42 MB)Injection valves, purge and trap concentration, and heated static headspace. |
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8610C Manual Part 6(13.37 MB)Autosamplers, PeakSimple Tutorials, and PeakSimple Software. |
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8610C Manual Part 7(10.31 MB)PeakSimple Software (continued). |
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8610C Manual Part 8(14.01 MB)PeakSimple Data Systems, Hydrogen Generator, and Maintenance. |
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8610C Manual Part 9(15.21 MB)Schematics. |
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8610C Manual Part 10(8.49 MB)Replacement Parts, Application Notes, and COBRA Vertical Autosampler Manual. |
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8610C Manual Part 1(10.65 MB)Introductory matter, GC Quick Start, 8610C GC Chassis, 310 GC Chassis, and 110 Stand-Alone Detector Chassis. |
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Electronics Schematics(24.13 MB) |
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Complete Electronics Schematics Set(2015)(45.26 MB) |
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Model 510 Methanizer Schematic(58.36 KB)This schematic is for the Model 510 Methanizer built after April 2018. |
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Replacing the Op-Amp Chip in Your GC(122.14 KB) |
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EPC Maintenance(2.41 MB) |
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FID Collector Electrode Replacement(457.51 KB) |
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FID Ignitor Installation(444.42 KB) |
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Replacing FID Ignitor(668.38 KB) |
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8610C Manual Part 2(13.58 MB)GC Installation and Preconfigured GC Systems. |
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Relay Board Installation(3.07 MB) |
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Cooling Blower Installation(956.22 KB) |
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Chasis Fan Replacement(244.06 KB) |
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Oven Motor Replacement(229.30 KB) |
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Replacing the Polishing Filter(199.90 KB)This document shows how to replace the polishing filter on 8610C GCs. |
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TCD Resistor Replacement(1.49 MB) |
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TCD Filament Protect Chip Replacement Jan 2016(144.47 KB) |
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8610C Manual Part 3(14.21 MB)GC Detectors. |
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Model 333 Chip Replacement(1.29 MB) |
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333 Reintialization resistor update(570.75 KB)This document shows how to change the two resistors on the 333 A/D board in order to reduce the incidence of re-initializations ( communication losses ). |
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Model 333 Relay Kit Installation(1.68 MB) |
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Air Compressor Filter Replacement(866.71 KB) |
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Air Compressor Installation(2.79 MB) |
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Vacuum Pump Interface Self-Installation(3.13 MB) |
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Heat Board Troubleshooting(1.64 MB)This document explains how to troubleshoot your heat board when the Thermocouple out of Range Alarm trips |
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Temperature limits of various GC column stationary phases(1.05 MB)Courtesy of Restek, a chart showing the upper temperature limits of many GC stationary phases |
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Packing the RGD Reaction Tube(326.24 KB) |
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8610C Manual Part 4(14.46 MB)Detectors (cont.), Methanizer, and Syringe Injectors. |
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TOGA GC Permeation Tube Replacement(453.96 KB) |
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Valco Actuator Connections(208.55 KB)Pictures of the connections for the Valco Valve actuator |
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Supplemental Power Supply for Gas Sampling Valves Jan 2019(831.40 KB)This document describes the installation of a supplemental power supply kit for gas sampling valves which are acting erratically |
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Greenhouse Gas GC Valve Diagram/Event Table(30.88 KB) |
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Amp Board Capacitor(1.41 MB) |
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Losing Communication Troubleshooting Guide(527.38 KB) |
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TID Bead Replacement(1.36 MB) |
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A to D board Capacitor Installation(5.78 MB) |
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Heaters(435.62 KB) |
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Connecting Gas Cylinders(891.38 KB) |
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Column Rinsing to remove Contaminants(1.84 MB)This document shows how to solvent rinse a column using the Model 310MM GC. |
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Leak Check(382.75 KB) |
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Using soft Graphite ferrules(851.85 KB)This document explains how to pre-squish soft graphite ferrules which are so large they don't connect easily to the mating fitting. |
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Ferrules(2.06 MB) |
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Cutting Tubing For SRI GCs(452.02 KB) |
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Flow Measurement(560.90 KB) |
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Multiple Gas#5 GC Column Bake-out Procedure(1.44 MB)This document explains how to bake-out the columns in the SRI Multiple Gas#5 GC configuration. |
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Heater Element Replacement 8610B(402.54 KB) |
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| Papers, Applications Notes, and Forms | |
1ppb BTEX and below using SRI PID GC with air carrier(31.42 KB)This link takes you to a paper by an SRI customer testing a miniature SRI PID pre-concentrator GC that runs on ambient air to measure 1ppb and below in the field with no carrier gas cylinders required. This makes it a lot easier to deploy. The user also uses a battery for power. https://www.preprints.org/manuscript/202102.0317/v1 |
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"Zero" air vs. Room Air on FID noise(250.46 KB)This document compares the difference between " zero" grade cylinder air and room air on FID noise and sensitivity. |
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FID Methane Detection Limit(90.16 KB) |
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Retentiion time stability using air as carrier gas(219.74 KB)This power point from a customer shows how stable the retention times are using an SRI GC configured to use air as a carrier gas and a DELCD detector. |
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Useful links(18.78 KB)This is a useful GC troubleshooing guide. https://phenomenex.blob.core.windows.net/documents/b043f709-428f-4697-9791-7b0f2baf9b77.pdf |
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BioDiesel GC Operation(2.01 MB) |
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BioDiesel GC Operation v.3(1.30 MB) |
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Method 16B Analysis(1.53 MB) |
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Multiple Gas Analyzer #3 Gas Detection Limits(453.40 KB) |
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CTR-1 Column Equivalent(1.80 MB) |
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FAME Analysis(56.97 KB) |
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PCB in Transformer Oil GC Operation(3.11 MB) |
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TOGA GC Operation (Membrane)(847.47 KB) |
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FAMES Chromatograms(1.97 MB) |
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Thermal Desorber Instructions(979.13 KB) |
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Formaldehyde in Air by HPLC UV with the SRI Model 210D(145.28 KB) |
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DET Chemical Detection(5.14 MB) |
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Gel Permeation Chromatography(74.17 KB) |
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Hydrogen Detection Limits(68.91 KB) |
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Water Analysis Using The HID Detector(65.75 KB) |
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Dissolved Gas/Transformer Oil Gas Analysis(1.84 MB) |
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Oxygenate Selective Detection for GC(6.99 MB) |
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Stationary Phases(416.61 KB) |
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Statistics in the Laboratory: The Limit of Detection(33.09 KB)Click here to read this article. (This link will take you off of Srigc.com) |
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Low Level Ethylene Measurement In Air(86.19 KB) |
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Sulfur Trapping(2.01 MB) |
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A Tool for Selecting an Adsorbent for Thermal Desorption Applications (by Supelco, on their website)(1.77 MB) |
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| Chromatogram Library | |
H2 in ambient air using SRI RGD detector(735.45 KB)These chromatograms show ppm and sub-ppm H2 in ambient air using the Reduction Gas Detector ( RGD ). |
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MultipleGas#5 chromatograms(2.31 MB)These chromatograms show H2, O2, N2, CH4, CO, CO2 C2H2, C2H4, C2H6 and C1-C6 plus barbeque propane |
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Formaldehyde detection using FIDmethanzer(183.34 KB)Formaldehyde is easy to measure using a FIDmethanizer. This is more sensitive than a TCD detector. |
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High Temperature wax boiling point distribution(893.27 KB)This shows a typical wax chromatogram ( 5 meter MXT 502 .25micron column ) overlaid with C10-C28 alkanes for retention time comparison. |
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1% gas mix on 12' Haysep D column(539.35 KB)This chromatogram shows good separation of H2 and air |
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Fixed Gases plus C2 isomers on Haysep S+D combo column(573.56 KB)This chromatogram shows excellent separation of C2 isomers on a MultipleGas#5 GC |
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Volatile Fatty Acids using PID detector(665.87 KB)This chroamtogram shows C1-C7 VFAs at 10mM in water injected into a 15MXTwax 2micron column |
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Separation of C2 and C3 isomers on Haysep S and D(708.04 KB)This series of chroamtograms shows how a combination of Haysep S and Haysep D columns in series can separate both the C2 and C3 isomers |
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Detection limit for SRI "dual" FPD+FID detector(4.69 MB)These chromatograms show the detection of sulfur at 1ppm and phosphorus at 1ppb using the dual FPD+FID detector |
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Formaldehyde detection using HID detector(1.42 MB)Formaldehyde does not respond well on FID or PID detectors, and sensitivity is limited on TCD. HID provide an alternative way to measure formadehyde in the low ppm range. |
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1% mix on 12' Haysep D column(517.78 KB)This chromatogram shows the separation of H2, air, CO, CH4 and CO2 on a 12' Haysep D column. Both TCD and FIDmethanizer are shown |
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Formic Acid using HID detector(1.27 MB)Formic Acid does not respond well on FID.This chromatogram shows formic acid using a HID detector and 30meter MXT-wax column |
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Propane/Propylene separation on 12foot Haysep D column(227.18 KB)This chromatogram shows the separation at 500ppm each. |
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Nitric Oxide using PID detector(462.56 KB)These chromatograms show detection of NO from .5-50 ppm. |
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1ppb Isoprene, a-Pinene and Limonene in air(3.62 MB)This chromatogram shows a dual column system to measure both the very volatile isoprene and the less volatile a-Pinene and Limonene ( terpenes ) in air. An Alumina PLOT column wa used to separate isoprene from the many possible interfering molecules. A plolar column did double duty as both a pre-column to protect the Alumina and as a separation column to handle the terpenes. |
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ETO ( ethylene oxide ) 0.5ppm in Air(1.18 MB)These chromatograms show .5,5 and 50ppm ETO using Hydrogen and also using Argon carrier for slightly high sensitivity. |
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DMMP+DEMP on FPD with phosphorus filter(1.33 MB)These chromatograms show 10 and 100ppb liquid injections of DMMP and DEMP |
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Ethylene Oxide in air from .5ppm to 50ppm(793.78 KB)These chromatograms show ETO detection limits below .5ppm |
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H2S and NH3 using 30RTX U-Bond column and PID detector(589.54 KB)This chromatogram shows 100ppm levels of H2S and NH3 on a 30 meter U-Bond column and PID detector. |
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PPM levels of Ammonia using a PID detector(689.12 KB)This chromatogram series shows ammonia ( NH3 ) measurement at levels frpom 10-1000ppm using a PID detector anda 30 meter RTX U-plot column |
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Ammonia separation on 30 meter RTX U-plot column(2.92 MB)These chromatograms show Ammonia ( NH3 ) seprated on the 30 meter RTX U-plot column. |
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Ammonia ( NH3 ) on 1meter Chrom103 column and TCD detector(1.04 MB)This series of chromatograms shows NH3 vapor injections on a 1meter Chrom 103 packed column in teflon tubing. |
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Fast H2, N2 and NH3 in 2 minutes(3.03 MB)This chromatogram and valve diagram show H2, O2, N2, NH3 and H2O separated in 2 minutes using 2 TCD detectors and one PID detector for better sensitivty to NH3 at ppm levels. |
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Ammonia Detection as a continous Stream using the PID detector(177.10 KB)This chromatogram shows that the PID detector can measure Ammonia in a continuous stream ( 40ml/minute ) down to 10ppm levels. |
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Ammonia detection as a continuous stream using the PID(202.98 KB)This chromatogram shows the repsonse of the PID to 200ppm NH3 fed to the PID detector as a continuous stream rather than injected into a column, |
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H2 vs. Argon carrier for MultipleGas#5 GC(902.41 KB)Apples to apples comparison of H2, O2, N2, CH4 CO and CO2 on the same MG5 GC using hydrogen and then argon carrier gas |
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Ammonia detection using TCD and silicone membrane(1.94 MB)This chromatogram shows detection of Ammonia in water using a TCD detector, Haysep P column and a silicone tube used as a membrane sampling probe. |
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MultipleGas#5 Typical chromatograms using H2 and Argon carrier(1.65 MB)These chromatograms compare the MG5 peaks on H2 and also on Argon carrier Gas. |
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MG5 chromatogram plus methanol and ethanol(638.86 KB)This chromatogram shows a mix of hydrocarbons plus methanol and ethanol separated from the late eluting CO2 peak. |
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MultipleGas#5 ReproducibilityTest(1.10 MB)This series of chromatograms and data show the Reproducibiliy of methane and CO on the Multiple Gas #5 GC |
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Hydrogen in Natural Gas using Nitrogen carrier gas(1.01 MB)These chromatograms show 10ppm up detection of hydrogen. |
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Helium-Hydrogen Separation on 12' MS5A column(225.07 KB)This chromatogram shows helium and hydrogen at 1000ppm separated on a 12 foot MS5A column |
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MultipleGas#5 GC to GC uniformity(1.29 MB)These 3 chromatograms show the same sample run on 3 different MG5 GCs for sensitivty comparison. |
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6 minute Natural Gas ( BTU content ) analysis(1.56 MB)This chromatogram shows a six minute natural gas chromatogram run at 75C isothermal, so the cycle time is really six minutes. The GC is configured with TCD and FID detectors |
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Typical MG5 TCD sensitivity using helium and Argon carrier gas(525.99 KB)These chromatograms shows the typical TCD sensitivity of the Multipl Gas #5 GC configuration |
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Methanizer CO2 challenge(627.11 KB)These chromatograms show that the methanizer catalyst is not depleted when many injections of 100% CO2 are made. |
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1% and 100% CO2 on MultipleGas#5 GC(946.18 KB)These chromatograms compare the peak shape of CO2 at 1% and 100% on the MG5 GC |
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Detecting Formic Acid and Formaldehyde with FID Methanizer(1.98 MB)This document describes how to use an SRI Instruments Gas Chromatograph equipped with an FID-Methanizer to detect formic acid down to the 1ppm level and formaldehyde down to the 20 ppm level |
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MultipleGas#1 typical chromatogram(509.89 KB)This doc shows a typical chromatogram of 1% gases on the Multiple Gas #1 GC configuration with TCD and FIDmethanizer detectors. |
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H2, O2, N2, CH4,CO on 6' MS5A column and TCD detector(261.38 KB)This cheomatogram was obtained with argon carrier gas. |
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CO2 on 1 meter MS5A column(222.11 KB)This chromatograms shows CO2 eluting from a 1 meter MoleSeive 5A column. It is not well known that this is possible, and may be useful for some applications. |
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Using Room air as carrier gas with TCD detector(731.01 KB)These chromatograms show room air and human breath on a SRI Educational TCD GC using hydrogen and then room air as carrier gas. The room air carrier is supplied by a built-in air compressor making this unit operate with no gas cyclinders. |
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MS5A column before and after Bakeout(539.78 KB)This chromatogram compares the dramatic difference is separation between methane and CO, before and after a weekend bakeout at 270C. |
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Water elution on a 3' MS5A column(390.82 KB)It is well known that water is strongly retained on a moleseive column. This chromatogram shows what water looks like as it elutes at 300C. |
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VFA calibration standard(997.26 KB)This chromatogram shows 9 volatile fatty acids on a 30MXTwax column. Formic acid is not detected by the FID detector. |
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Detection of N2@25ppm(954.88 KB)This chromatogram shows detection of 25ppm N2 using a TCD detector and hydrogen carrier gas. |
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CO2 reproducibility on MS5A column(860.80 KB)This series of 3 injections demonstrates a %RSD of .6% for CO2 injected on a 6' MS5A column. |
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CO2 elution from Alumina column(476.34 KB)These chromatograms show where CO2 elutes from a 1 meter packed Alumina column.compared to C1-C6 alkanes/olefins |
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C2isomers on Haysep S/D combination column(428.41 KB)This chromatogram shows nice separation of CO, CH4, CO2 and the 3 C2 isomers on a column with HayeSep D and HayeSep S. |
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Refrigerant mix on Haysep S column(203.12 KB)This chromatogram shows a mix of refrigerants including R11 and R123 separated on a 6' Haysep S column. |
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11 Cannabinoids ( including newer ones of interest in 2023 ) and some stereo-isomers(3.30 MB)These chromatograms show 11 cannabinoids separated on a SRI Edibles GC Including CBD, d8THC, d9THC, CBCC, 9R-HHC, 9S-HHC, d9THC-O, d9THC-P, 9R-HHC-P, 9S-HHC-P and d9THC-P |
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Argon-Oxygen separation using a 24 foot MoleSieve 5A column(1.30 MB)This series of chromatograms shows room air separated on a 24 foot long Molesieve 5A column at various temperatures including in a dorm fridge at 5C. |
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1% Gas Mixture using SRI MultipleGas#1GC HID/TCD(534.42 KB)This chromatogram shows H2, O2, N2, CH4, CO, C2H6, CO2, C2H4 and C2H2 on the SRI Multiple Gas#1 GC configuration with HID and TCD detectors in series. |
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Hydrogen Plus CO,CO2, CH4 C2H4 and C2H6(525.91 KB)This chromatogram shows common gases separated on a 12 foot Haysep D column using the SRI MG3 GC. |
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Natural Gas using TCD(1.10 MB)This chromatogram show natural gas standard run the the Natgas GC configuration using Hydrogen carrier gas Data is shown for both 1 meter and 2 meter Haysep D columns in series with a 30meter MXT1 1micron film capillary column |
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Krypton in Natural Gas(478.62 KB)This chromatogram shows krypton measured in Natural Gas ( 80% methane ). Krypton is difficult to separate from methane on nearly all columns. A tcd detector was used with methane carrier gas which made the detector blind to the methane in the natural gas sample, so the krypton could then be detected. |
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Helium at ambient levels ( 5.2ppm )(2.21 MB)This series of chromatograms shows helium in outdoor air measured with aTCD detector and both Argon and Air carrier gas. |
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1000ppm Krypton in Natural Gas(267.73 KB)This chromatogram shows Krypton in Natural Gas using methane as the carrier. It was difficult to separate krypton from the methane peak in natural gas, but by using methane as the carrier gas we were able to measure the krypton easily. |
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Water and Alcohols on Haysep D column(207.93 KB)This chromatograms shows air, water, methanol, ethanol, and isopropanol on a 6 foot Haysep D column. Oven temperature was 150C isothermal. |
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Residual Solvents on Haysep R/D column(1.05 MB)SRI packs a special 3 foot ( 1 meter ) column that is half Haysep R and half Haysep D. This column separates ethanol from isobutane, methanol from propane and aceetone from pentanes.Other column types have trouble with these separations. |
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C1-C7 Carboxylic Acids on a 30 meter MXT-wax 1 micron(217.45 KB)This chromatogram shows the C1-C8 Carboxylic Acids ( VFA ) injected on a 30 meter MXT-Wax 1 micron film column. |
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37 Fatty Acids on 100 meter RT-2560 .25mm id column(461.55 KB)This very long narrow bore column can resolve most fatty acids using 30:1 split injection. |
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Glycerol ( Glycerine ) on 30MXT502 column(725.92 KB)This series of chromatograms shows 3% Glycerol ( same as glycerine ) injected on the 310MM GC using a 30 Meter MXT502.2 1micron film column. The good new is that the glycerol elutes well away from the cannabinoid peaks so it does not interfere. |
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Gasless Educational CCD sensitivity(687.60 KB)These chromatograms show the sensitivty of the CCD ( Catalytic Combustion Detector ) detector on the Gasless Educational GC using room air as carrier gas. |
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Hydrogen, Methane and CO2 susng Model 30 TCD GC(273.10 KB)This chromatogram shows .5ml of 1% gases separated at room temperature on the very small, low cost Model 30 GC with a 3 foot Haysep D column. |
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CTR1 column chromatograms(430.01 KB)The SRI CTR1 equivilent column set is a combination of Haysep D and MoleSieve 5A columns in parrallel. This is useful for measuring O2, N2, CH4, CO and CO2 in one injection. |
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TCE on Four detectors(1.28 MB)These chromatograms show TCE at 1ppm and 100ppb on FID, PID, DELCD and ECD detectors. |
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BTEX+TCE and PCE using FID/DELCD combo detector(502.97 KB)This chromatograms shows how useful the combination FID and DELCD detector is. The DELCD responds only to the halgenated molecules like TCE and PCE while the FID responds to all hydrocarbons. |
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BTEX on Cannabis GC column(475.90 KB)These chromatograms show 1 and 10ppm BTEX using the 30 meter MXT502 column supplied with SRI Cannabis testing GCs. Its useful to measure benzene and other toxic residual solvents on the capillary column because the packed column used for residual solvents does not elute benzene as a sharp peak so 1ppm detection is not practical on the packed column but is very possible on the capillary column. |
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Hydrogen detection on SRI RGD detector(472.50 KB)These chromatograms show the detection of ambient H2 ( about .5ppm ) using the SRI RGD ( reduction gas detector ). |
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SF6 detection at ambient levels using both loop and trap(2.38 MB)This series of chromatograms shows the detection of SF6 ( sulfur hexafluoride ) using an SRI GC with ECD detector. Detection is compared between a 1ml loop injection and a pre-concentrator trap. |
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EdiblesGC Stop-flow and Backflush timing(522.73 KB)This chromatogram shows the effect of the mid-point stop flow timing on the Edibles GC configuration. |
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Comparison of MXT500 and MXT502 Columns for Cannabis Analysis(199.26 KB)This one page documents shows the temperature programs used on the two column types. SRI has had to switch from the 15 meter MXT500 column to a 30 meter MXT502 column because the MXT500 column is no longer produced as of 2020. The new MXT502 column is better in some ways. |
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7 Cannabinoids on 30MXT502.2 column(849.40 KB)This chromatogram shows THCV, CBD, CBC, d8THC, d9THC, CBG and CBN separated on the 30 meter MXT502.2 column. |
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THCA vs d9THC comparison(500.96 KB)These chromatograms show equal amounts of THCA and d9THC injected on-column under identical condtions. It shows that THCA converts to d9THC in the GC very close to ( within statistical error ) the theorectical conversion rate of .877. |
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D10THC separation on SRI GC(263.54 KB)This chromatogram shows that D10 elutes between D8 and D9 on an SRI 310 GC using cylinder H2 carrier and a two column backflush configuration. |
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THCP and 11HydroxyD9THC plus 7 other cannabinoids(857.18 KB)This chromatogram shows the elution times of 9 cannabinoids including THCP and 11HydroxyD9THC. |
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Typical 1 minute Mudlogger C1-C5 and C6+ backflush(872.58 KB)These chromatogram show the typical tests we run for the 1 minute mudlogger configuration. |
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TapWater Purge&Trap with ECD and DELCD detectors in series(543.94 KB)This chromatogram shows the relative responses of the DELCD and ECD detectors to the TriHaloMethanes ( THM ) in tap water. |
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Ethylene Oxide at ppm levels(733.57 KB)These chromatogams show .5, 5 and 50ppm ETO on a 3' Haysep D column |
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10ppm BTEX+ on PID and FID in series(445.94 KB)This chromatogram shows the response of the two detectors plumbed in series. |
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Trihalomethanes in Water using DELCD detector and Purge&Trap(1.56 MB)This set of chromatograms shows the measurment of THMs in water ( at ppb level ) using the SRI 8610C GC equipped with DELCD detector and Purge&Trap concentrator. Results are shown with helium carrier gas and then again using plain room air ( from the built-in air compressor ) as the carrier gas resulting in a GC which requires no gas to perfrom this analysis. |
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GreenhouseGas GC chromatograms(2.80 MB)Final test chromatograms from a Greenhouse Gas GC which also has a TCD detector for H2, O2, N2 analysis alsong with the normal methane, CO2 and N2O peaks. |
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Typical Cannabinoids Chromatogram(107.55 KB)This chromatogram shows a typical separation of CBD, CBC, d9THC, CGB and CBN on a 15meter MXT500 .25micron .53mmid column. |
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Hemp sample derivitized and un-derivitized(1.32 MB)This series of chromatograms shows a hemp sample measured two ways, derivitized and not derivitized. |
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Terpenes and Cannabinoids in one analysis(463.53 KB)This chromatogram shows 15 terpenes and 5 cannabinoids measured in one analysis on a Restek 30 meter MXT502.2 1 micron film column |
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Olive Oil and MCT OIL on the SRI310MM cannabis GC(1.10 MB)These chromatograms show olive oil, MCT oil and the cannabinoids on the 15meter MXT500 .25micron column. |
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Cannabinoids in MCT oil using SRI 310Edibles GC configuration(886.96 KB)These chromatograms show how the SRI 310Edibles GC uses its stop-flow and backflush capability to reject the MCT and hiogher boiling oils while still measring the cannabinoids ( CBD, THC and CBN ). The pre-column in this GC configuration cataches the higher boiling molecules and then backflushes them to vent so they never arrive at the main column. |
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Cannabis "Edibles" GC test sequence(1.09 MB)This series of chromatograms show how the stop-flow timing affects the high boiling peak cut-off |
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Argon-methane ( P5 ) compared to Nitrogen as ECD carrier gas(1.98 MB)This chromatogram series compares the Greehhouse Gas GC configuration using P5 vs N2 when measruing N2O in room air and also N2 vs Hydrogen as carrier gas when measruing ambinet methane. Reprducibily is also caculated for N2O using P5 carrier. |
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Sulfur in Natgas(1.08 MB)These chromatograms show H2S, COS, SO2 and DimethylSulfide separated from natural gas hydrocarbons C1-C6 using the SRI Sulfur in Natural Gas GC configuation. This configuation uses two columns to achieve the best separation. |
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18ppb H2S ( hydrogen sulfide )(947.43 KB)This series of chromatograms shows 18ppb of H2S measured using a preconcentrator trap and FPD detector |
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Monomers on FID and 10MXT1 3micron column(676.84 KB)This chromatogram shows assorted monomers separated on a non-polar column. |
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| Cannabis and Hemp | |
Latest California Regulations(1.27 MB)This is the 7-19-2018 version of the California cannabis regulations. See chapter 6 for the lab testing requirements. |
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Link to Interlab precision study for Cannabis/Hemp(31.42 KB)https://www.rs.uky.edu/regulatory/hpt/reports.php |
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310M&M Startup kit November 2018(111.93 KB)This doc shows the contents of the startup kit supplied with the 310M&M GC for cannabis testing |
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Sources for Cannabis and Terpene Calibration standards(112.48 KB)This docs has links for where to buy Cannabinoid ( CBD, THC etc ) and Terpene ( myrcene, limonene etc ) calibration standards. |
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Link to Steep Hill Labs explanation of decarb efficiency(18.78 KB)This link explains that the real conversion rate of THCA to d9THC is not the usually accepted .877, but is instead closer to .68. https://support.steephill.com/hc/en-us/articles/218879407-How-much-THC-can-I-expect-after-decarboxylation- |
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Long Beach Cannabis Lab Testing requirements(245.00 KB)This doc from the City of Long Beach CA describes the requirements for labs testingmedical cannabis. |
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CA Cannabis Testing Reasons May 2017(2.97 MB)This doc explains the reasoning behind the proposed CA regulations as of May 2017 |
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THCA vs d9THC(500.96 KB)These chromatograms show equal amounts of d9THC and THCA injected on-column under identical condtions. It shows that the THCA converts to d9THC very close to the theorectical conversion rate of .877 without degradation or loss. |
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Residual Solvent Calibration: Ethanol and Butane(77.23 KB)Procedure to calibrate ethane as a residual solvent |
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310MM Cannabis and Hemp GC Configurations(447.59 KB)General information on SRI's two 310MM Cannabis and Hemp GC Configurations for testing cannabinoid potency, terpenes, residual solvents, and edible cannabis products. |
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11 Cannabinoids ( including some stereo-isomers ) separated on SRI Edibles GC(3.30 MB)This series of chromatograms show separation of many newer ( 2023 ) cannabinoids of interest ( CBDD, 9R-HHC 9S-HHC, THC-O, 9R-HHC-P, 9S-HHC-S as well as CBD, d8 and d9THC, and CBN _ |
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Fixing the Disappearing CBN Peak(170.90 KB) |
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Cannabis and Hemp Potency Testing (THC, CBD, CBN)(1.39 MB)The procedure for cannabis and hemp potency analysis (e.g., THC, CBD, CBN ...) in cannabis flower. |
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Basic Sample Preparation for Edibles Cannabis Testing(1.17 MB)Basic sample preparation of edible cannabis and hemp enfused products for potency testing (CBD, THC, CBN). |
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All-In-One Cannabis Potency and Terpene Analysis(552.42 KB)Concurrent analysis for potency and terpene profiles in cannabis. |
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New Developments in Cannabis testing by GC January 2018(938.58 KB)This document explains how to derivitize cannabis samples for better quantitation and to measure THCA and CBDA as well as d9THC and CBD in the same analysis. Hugh |
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Terpenes in cannabis analysis(2.64 MB)Analysis of terpene profile |
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Cannabinoid Standard Comparison(268.26 KB) |
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Advanced Edible Cannabis Sample Preparation(1.90 MB)A more advanced and thorough sample preparation of cannabis infused edible products. Following this procedure can help preserve your column, and is recommended for certain infusions. |
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Internal Standard Calibration for Cannabis Testing(1.54 MB)This document describes Internal and External calibration for Cannabis Analysis |
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Calibrating six cannabinoids in CBD standard(758.57 KB)Method to calibrate 6 major cannabinoids with just a CBD standard |
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Colorado Hemp Testing SOPs(964.17 KB)This document describes the hemp testing protocols suggested by the State of Colorado |
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Calibration of residual solvents (butane)(170.48 KB)Explaination on how to calibrate butane for residual solvent analysis |
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Colorado Hemp Drying and Sample Prep Method(375.96 KB)This document outlines the Colorado suggested method of drying and preparing a hemp sample for GC analysis. |
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Specific Instructions for version 4.90(553.41 KB)This document explains how version 4.90 is pre-setup for internal standard as well as normalized area percent calculations. Normarea% is better for distillates and isolates |
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Residual Solvents In Cannabis and Hemp Concentrates Testing(856.28 KB)This document describes how to test cannabis and hemp concentrates for residual solvents used in the manufacturing process such as butane, acetone, and gasoline residue. |
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THC-A vs. d9-THC Measurement(914.57 KB)Procedure to anaylze THC-A and other acid forms of cannabinoids (e.g., CBD-A, CBN-A...) on a gas chromatograph |
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Terpenes in Cannabis Comparison on Two Columns(366.77 KB)This document shows the retention order of most terpenes on the two most widely used columns for terpene analysis. |
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Simple Cannabis Potency Testing(5.20 MB)Article written to explain the ease of testing cannabinoids on the SRI Gas Chromatograph |
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Cannabinoid Calibration Math(30.61 KB)This document describes how to convert from the nanograms/microliter result from the calibration curve to the starting percentage in the flower, concentrate or edible sample. |
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May 2017 proposed CA testing rules(466.89 KB)This document details the proposed rules for california Cannabis Testing Labs |
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| Approvals, Certifications, Forms, and Warranty | |
Resale certficate for SRI(680.35 KB)This is the reasale certficate for Scientific Repair Inc. dba SRI Instruments EIN 95-4121838 |
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Privacy Policy(140.24 KB) |
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US Customs Form 3311(885.04 KB)This form should accompany any shipment of SRI equipment back to the USA from abroad. |
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Importers Declaration for support Form3311 for return of US goods(566.80 KB)This form is sometimes needed along with Form 3311 when returning a GC to SRI from out of the USA. |
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2024 LiabilityInsurance Certificate(1.19 MB) |
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Certificate of Origin(436.23 KB)This document certifies that all SRI gas chromatographs are manufactured in the USA. |
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NAFTA Certification of Origin(650.14 KB) |
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Declaration of Conformity, and other certificates(274.70 KB)Click here to see our TUV Certification |
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Exemptions allowed for CE/ROHS marking of products for R&D use(4.65 MB)These documents show that SRI Gas Chromatographs sold for R&D purposes in the European Union are not subject to the requirements of the Low Voltage and Electromagnetic Compatibility rules which govern consumer appliances ( the CE and ROHS marks ). |
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Model 510 Standalone Methanizer CE tests(2.16 MB) |
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TUV Factory Inspection Report November2020(3.89 MB)This shows compliance with TUV who issues our NRTL ( UL and CSA equivilent ) and GC certifications. |
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2024 Workman'sCompLiabilityCert(696.98 KB) |
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Test Report EM(673.26 KB) |
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TUV CDF 4-13-2018(101.12 KB)This is the CDF for SRI products approved by TUV dated 4-13-2018 |
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TUV certification checklist(487.64 KB) |
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TUV 61010 test(3.53 MB) |
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EPA Pams Report(8.25 MB)This document was produced by the EPA after extensive testing of the SRI ( and other brands ) GCs for air pollutants in the 1ppb range. |
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SRI Repair Report Template for GC repairs and updates(61.13 KB) |
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TUV NRTL ( UL and CSA equivalent ) certificate(1.02 MB)This certifies that SRI GCs are NRTL approved, the legal equivalent of UL or CSA approval. |
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SRI Warranty(41.38 KB)This is SRI's warranty. |
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SRI W-9 Form signed in 2021(604.00 KB) |
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