GC-MS Determination of Semi-volatile Organic Contaminants in Water with SPME

GC-MS with solid phase micro-extraction (SPME) was applied to the determination of 24 semi-volatile organic contaminants (SVOC′s) in water. To attain a higher efficiency in SPME, 85 μm polyacrylate fibre was selected as coating for the micro-extractor, and the extraction was carried out at 50 ℃ for 30 min. The analyte were separated on DB-5MS capillary column and detected by EI ion source with whole scanning monitoring mode. Linear relationships between values of peak area and mass concentration of the 24 SVOC′s were kept in the same range of 1.0-40 μg·L-1. Detection limits (3S/N) found were ranged from 0.11 to 0.39 μg·L-1. Tests for recovery were performed by addition of mixed standards of the 24 SVOC′s for 7 parallel determinations each, results of average recovery found were in the range of 51.0%-95.8% with RSD′s (n=7) less than 16%.