期刊
JOURNAL OF CHROMATOGRAPHY A
卷 874, 期 1, 页码 149-154出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S0021-9673(00)00067-4
关键词
headspace analysis; water analysis; extraction methods; chlorobenzenes
Headspace solid-phase microextraction (SPME), as a simple, solvent-free method, has been applied to the analysis of 10 chlorinated benzenes (CBs) present at trace levels in water samples. An SPME fibre coated with 100-mu m thick poly(dimethylsiloxane) was used for extraction. The analytical data exhibited a relative standard deviation (RSD) range of 1.19% (for pentachlorobenzene) to 8.19% (for hexachlorobenzene) for the 10 CBs; the RSD of most compounds was under 6%. The sensitivity of the method was enhanced with agitation and with addition of salt to the sample solutions. With mass spectrometric detection, the limit of detection was below 0.006 mu g/l for all 10 CBs after a 30-min sampling time. The linearity range was 0.02-20 mu g/l for the compounds studied. Water samples collected from a reservoir, and from the tap in a laboratory were analysed using the optimised conditions. (C) 2000 Elsevier Science BN. All rights reserved.
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