Noncryogenic FSOT column separation of sulfur-containing gases

✍ Scribed by Barinaga, C. J. ;Farwell, S. O.

• Book ID: 102893668
• Publisher: John Wiley and Sons
• Year: 1987
• Tongue: English
• Weight: 514 KB
• Volume: 10
• Category: Article
• ISSN: 0935-6304
• DOI: 10.1002/jhrc.1240101002

✦ Synopsis

Fused silica open tubular (FSOT) capillary column GC separations of low molecular weight, reactive sulfur-containing gases (S-gases) are significant improvements over packed column separations in terms of resolution, detection limits, and conditioning effects. Nevertheless, some of the problems with current FSOT capillary systems include matrix injection incompatibilities; detector dead volumes; the necessity for cryogenic initial oven temperatures to separate CO2, HzS, COS, and SO2; and relatively long analysis times to separate later, closely eluting compounds. A noncryogenic FSOT GC-FPD system that either reduces or eliminates these problems is reported. Baseline separation of seven common S-gases (H2S-DMDS) is achieved in less than 5 min with ambient initial oven temperatures via this system, which is a combination of 1) a cryogenic sample concentration/injection design that is flow compatible with a wide-bore FSOT column; 2) a combined DB-l/DB-WAX thick phase, wide-bore FSOTcolumnforgreatercapacity, retention, and tuned selectivity; and 3) a reduced dead volume FPD to minimize peak width and tailing.