Quantitative determination of airbone C1- and C2-halocarbons by GC/ECD

✍ Scribed by Frank, H. ;Frank, W.

• Book ID: 102893673
• Publisher: John Wiley and Sons
• Year: 1988
• Tongue: English
• Weight: 506 KB
• Volume: 11
• Category: Article
• ISSN: 0935-6304
• DOI: 10.1002/jhrc.1240110114

✦ Synopsis

Theatmospheric levelsof C1-and C2-halocarbonsaredetermined by trapping on an adsorbent, thermodesorption, cryofocussing, gas chromatographic separation on a thick-film capillary, and electron-capture detection. The various aspects relevant to reliabilityand accuracyarediscussed, such as typeof adsorbent, range of detector response, and levels of contaminants present in blanks. These in turn have implications for optimum sample size and amount of adsorbent. The adopted method is suitable for routine analysis of airborne halocarbons at variable locations. The air concentrations of C1-and C2-halocarbonson the ground of mountain forests are similar to those in cities, a fact which supports the hypothesis that chlorocarbons are involved in the initiation of a phytotoxicological phenomenon commonly referred to as "forest decline".