• Detect low sulfur concentrations
  
• Multiple gas analysis AND sulfur analysis in one unit
  
• Uses just 1 gas sampling valve and 3 columns
  
• Built-in, "whisper quiet" air compressor
  
• 6 channel PeakSimple data system
  ...on the compact 8610C chassis, or on the 8610V chassis for just $2,000 more.

Many analysts require natural gas analysis for various applications. Frequently, sulfur compounds are also of interest.

Because low sulfur concentrations (<50ppm) are difficult to measure, SRI has enhanced our popular Mulitple Gas Analyzer GC systems to simultaneously monitor low levels of sulfur compounds. The additional hardware required is an FPD/FID detector, which selectively detects sulfur down to mid-ppb range, and a room temperature sulfur-inert sample loop.

One reason sulfur is so difficult to measure is that it disappears on contact with hot stainless steel surfaces; even limited contact with a hot stainless steel loop will destroy any sulfur in the gas sample. Our solution is to use an inert transfer line leading to a splitter, and a 60-meter thick film capillary column. While Teflon columns are sometimes also used for sulfur analysis, the natural gas analysis (using molecular sieve and HayeSep D) requires column temperatures of 250^°C or higher. Since the sulfur column is located in the column oven, it is essential to use a column like the 60-meter capillary which can tolerate the higher temperatures.