Journal
JOURNAL OF CHROMATOGRAPHY A
Volume 1025, Issue 1, Pages 17-26Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.chroma.2003.08.058
Keywords
stir bar sorptive extraction; thermal desorption; polydimethylsiloxane rod extraction; extraction methods; water analysis; environmental analysis; chlorobenzenes; polychlorinated biphenyls
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A novel, simple and inexpensive approach to absorptive extraction of organic compounds from environmental samples is presented. It consists of a polydimethylsiloxane rod used as an extraction media, enriched with analytes during shaking, then thermally desorbed and analyzed by G,C-MS. Its performance was illustrated and evaluated for the enrichment of sub- to ng/l of selected chlorinated compounds (chlorobenzenes and polychlorinated biphenyls) in water samples. The new approach was compared to the stir bar sorptive extraction performance. A natural ground water sample from Bitterfeld, Germany, was also extracted using both methods, showing good agreement. The proposed approach presented good linearity, high sensitivity, good blank levels and recoveries comparable to stir bars, together with advantages such as simplicity, lower cost and higher feasibility. (C) 2003 Elsevier B.V. All rights reserved.
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