GC-MS Determination of 53 Volatile Organic Compounds in Source of Drinking Water with Solid-Phase Microextraction

GC-MS was applied to the determination of 53 volatile organic compounds in drinking water combined with solid-phase microextraction. The optimized conditions were as follows: ① extraction fiber: DVB/CAR/PDMS; ② extracting temperature: 25 ℃; ③ headspace volume: 9 mL; ④ extraction time: 10 min; ⑤ desorption temperature: 200 ℃; ⑥ desorption time: 3 min. The VF-624MS chromatographic column was used for GC separation and the full-scanning mode was adopted in MS determination. Linear relationships between peak area and mass concentration of the 53 volatile organic compounds were in definite ranges, with detection limits (3S/N) in the range of 0.001-0.130 μg·L-1. The proposed method was applied to the analysis of actual water samples, giving values of recovery and RSD′s (n=5) in the ranges of 75.9%-107% and 0.5%-18%, respectively.