期刊
CHROMATOGRAPHIA
卷 52, 期 1-2, 页码 93-98出版社
VIEWEG
DOI: 10.1007/BF02490799
关键词
gas chromatography; solid-phase extraction (SPE); chlorinated pesticides; polychlorinated biphenyls
Gas chromatography of polychlorinated biphenyls and chlorinated pesticides in water samples has been performed after adsorption from a 20 - 200-mL sample on to a cartridge containing 100 mg diol-bonded porous silica. The PCBs are desorbed with 500 mu l ethyl acetate, which is concentrated and analysed by gas chromatography with electron-capture detection (GC-ECD). The average recovery of 0.1 ng mL(-1) PCB congeners from distilled water and from Aniene river water is greater than or equal to 95% (standard deviation less than or equal to 2.8). Average recoveries of 25 ng mL(-1) Aroclor 1254 from distilled water and from Aniene river water were, respectively 94.4% and 92.5% (standard deviation 5.8). In the separation of PCB congeners from the chlorinated pesticides only the aldrin (40%) was eluted with the PCBs from the diet Sep-Pak cartridge by aqueous methanol. The method described is simple and reproducible.
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