Journal
CHROMATOGRAPHIA
Volume 52, Issue 11-12, Pages 787-790Publisher
VIEWEG
DOI: 10.1007/BF02491005
Keywords
gas chromatography-mass spectrometry; silica-Florisil cartridge clean-up; spice powder; chlorinated pesticide residues
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Levels of fourteen organochlorine pesticides have been determined in ready-to-use spice powders. The pesticides were extracted with n-hexane-dichloromethane (4:1) and the extracts were cleaned in a single step on a cartridge packed with silica- and Florisil. The pesticides were quantified by GC-MS in SIM (selected ion monitoring) mode. Recoveries measured for pesticide-free spices ranged from 60% for dieldrin and endrin to 97% for other pesticides. The relative standard deviation (RSD) of the method for all the pesticides was less than 15%. The method was applied to different spices (pepper, mace, and nutmeg). Methoxychlor, lindane, and DDT and its metabolites were found in all the samples; dieldrin and endrin were not detected in any.
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