The application of high speed gas chromatography to air analysis

摘要

The demand for frequent sampling (2 to 5 minutes) approaching a continuous mode has generated interest in high speed GC analysis. This paper describes an apparatus which produces a minimum injection bandwidth (10 to 50 msec) which provides the primary means of attaining good column efficiency while achieving High Speed GC Analysis. THis FastGC inlet which is mounted on a Varian 3400 Gas Chromatiograph is described and its operation is detalied from the cryofocussing of the dample onto a short Nickel tube to the 100,000 deg C /sec desorption to the 8 Meter x 0.32 mm capillary coumn. The applications described in the paper include the analysis of chlorinated hydrocarbons, polar organics, an ozone precursor standard (C2 to C13), and BTEX's Data regarding the recovery, response linearity, and retention time and area count precision are also reported.