Simultaneous GC-MS Determination of 39 Organic Contaminants in Natural Drinking Water with Solid-Phase Micro-extraction

GC-MS with solid-phase micro-extraction (SPME) was applied to the determination of 39 organic contaminants in natural drinking water. To attain a higher efficiency in SPME, the 60 μm PDMS/DVB fiber was selected as coating for micro-extractor, the extraction was carried out at 90 ℃ for 30 min, and the dissolution was carried out at 270 ℃ for 10 min. The analyte were separated on J&W DB-35 MS capillary column and detection was carried out by EI ion source with selecting ion monitoring mode. Linear relationships between values of peak area and mass concentration of 39 organic contaminants were kept in the same range of 0.10-50.0 μg·L-1, with detection limits (3S/N) in the range of 0.002-2 μg·L-1. Tests for recovery were performed by addition of mixed standard of the 39 organic contaminants for 6 parallel determinations, results of recovery found were in the range of 82.0%-110% with RSD′s (n=6) in the range of 2.0%-13%.