Gaseous sample compression as a means of increasing sensitivity in gas chromatographic analysis

Determination of Atmospheric Halocarbons by A Temperature-Programmed Gas Chromatographic Freezeout Concentration Method

“…1 Concentration on solid adsorbents has been used to collect large amounts of halogenated compounds for analysis, 2 -3 but this method suffers from the disadvantages of long sampling time requirements, the necessity for recovery studies, and more difficult sample transfer to the gas chromatograph. Another freezeout concentration technique for analysis of atmospheric samples for halogenated compounds is briefly described 4 but it appears to be more complicated than the method described here and allows less versatility in sample aliquot size.…”