Purge-and-Trap Analysis Using Fused Silica Capillary Column GC/MS

Abstract
Purge-and-trap analysis using fused silica capillary column GC/MS was evaluated for analysis of priority pollutant organics and compared to EPA Method 624, which uses packed columns. Using a packed column, this purge-and-trap GC/MS system generated precision data similar to that reported by others (5.8% compared to 5.1%). Preliminary tests of a 30-m SE54 capillary column system, using EPA volatile organic performance evaluation samples, WP006 and WP007, as unknown test materials, indicated satisfactory precision (8.5%) and excellent accuracy (98.5% and 102% recoveries). Not only was the capillary column much faster than the packed column (13 min compared to 33 min), it also overcame difficulties normally encountered with samples having excessive complexity, very large concentration spread among components, or high concentrations of high-boiling components.

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