Fast gas chromatography of light hydrocarbons and permanent gases on porous-layer open-tubular columns

✍ Scribed by Hao Yun; Milton L. Lee

• Publisher: John Wiley and Sons
• Year: 1996
• Weight: 64 KB
• Volume: 1
• Category: Article
• ISSN: 1086-900X
• DOI: 10.1002/(sici)1520-6521(1996)1:1<60::aid-fact8>3.0.co;2-i

✦ Synopsis

Relatively long lengths of porous-layer open-tubular (PLOT) columns operated at high carrier gas velocities

were used to separate light hydrocarbons and permanent gases in less than 60 s. Two types of stationary phases were used in this study: silica particles and a commercially available carbon molecular sieve (Carboxen). A high-speed gas sample injection system actuated with an electronic timer allowed sample injection in as fast as 40 ms. The Carboxen PLOT column showed excellent selectivity for permanent gases, whereas the silica PLOT column demonstrated good separations of light hydrocarbons within 30 s. PLOT columns offer a good compromise between open tubular columns and packed columns for field analysis of volatile compounds when rapid speed is desired.