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- Title
Determination of trace polychlorinated biphenyls and organochlorine pesticides in water samples through large-volume stir bar sorptive extraction method with thermal desorption gas chromatography.
- Authors
Feng, Li; Zhang, Shengjun; Zhu, Guohua; Li, Mufei; Liu, Jinsong
- Abstract
A fast and sensitive analytical method based on stir bar sorptive extraction technology with gas chromatography and mass spectrometry was developed to simultaneously analyze 18 kinds of polychlorinated biphenyls and 20 kinds of organochlorine pesticides in aqueous samples. A long adsorption time and small sample volume, which are problems encountered in conventional methods of stir bar sorptive extraction, were effectively solved by simultaneously using multiple stir bars for enrichment with sequential cryofocusing and merged injection. Optimized results showed good linear coefficients in the range of 10-500 ng/L and the method detection limits of 0.12-2.07 ng/L for polychlorinated biphenyls and organochlorine pesticides. The recovery ratios of the spiked samples at different concentrations were between 64.7 and 111.0%, and their relative standard deviations ranged from 0.9 to 17.6%. Four types of the studied compounds were determined in Qiantang River water samples, and their contents were between 0.82 and 5.00 ng/L.
- Subjects
POLYCHLORINATED biphenyls; ORGANOCHLORINE pesticides; WATER sampling; EXTRACTION (Chemistry); THERMAL desorption; GAS chromatography
- Publication
Journal of Separation Science, 2017, Vol 40, Issue 23, p4583
- ISSN
1615-9306
- Publication type
Article
- DOI
10.1002/jssc.201700305