The Analysis of volatile compounds by purge and trap with whole column cryotrapping (WCC) on a fused silica capillary column

✍ Scribed by Pankow, J. F. ;Rosen, M. E.

• Publisher: John Wiley and Sons
• Year: 1984
• Tongue: English
• Weight: 420 KB
• Volume: 7
• Category: Article
• ISSN: 0935-6304
• DOI: 10.1002/jhrc.1240070902

✦ Synopsis

The purge and trap (P&T) method of analysis has been interfaced with fused silica capillary column gas chromatography. This interfacing has been accomplished without splitting the P&T trap desorption carrier gas.Thus, 100% of the purged compoundsare transferred to the column. The analytes are cryofocussed on the column using whole column cryotrapping (WCC) at -8OOC. The resulting P&T/WCC procedure is extremely well-suited to the analysis of trace purgeable aqueous organic compounds. Samples and standards containing a variety of aromatic standard compounds were analyzed. The standards included benzene, toluene, ethylbenzene, xylenes, C3-C4-benzenes, and naphthalene, as well as three P&T internal standard compounds. Chromatographic peak widths were uniformly less than 6 s at the base and excellent precision was obtained in the relative retention time data for all compounds. l h e chromatogram of a groundwater sample contaminated with aromatic gasoline compounds is also presented. Since P&T/WCC works well with fused silica capillary columns, the full sensitivity and chromatographic efficiency of capillary gas chromatography is made available to P&T analyses.