Tenaxadsorbent.Thesampleswereanalyzed promptly using a Supelco air desorption unit interfaced to a Hewlett-Packard (HP) Model 5890 gas chromatograph (GC) equipped with an HP Ultra 2 capillary column and flame ionization detector.
GAS CHROMATOGRAPH-MASS SELECTIVE DETECTOR ANALYSIS FOR TRACE METABOLITES
After chemical injection, 500-mL air samples were collected from the chambers onto 18-cm (7-in.) by 0.6-cm (1/4-in.) outside diameter stainless steel tubes packed with Tenax adsorbent, using the Sensidyne-Gastec air pump. Trace chemical contaminants were desorbed from the Tenax tubes using a Tekmar Model 5000 automatic desorber into a HP 5890 GC equipped with a 30-m, 0.32 mm inside diameter, Restek Rtx--volatiles capillary column. The GC oven was initially cooled to 0 °C using carbon dioxide, and then followed a temperature program beginning at 0 °C, with a 30-s hold at 0 °C, and a rise in temperature of 8 °C/min. The program ended when the temperature