Determination of organochlorine pesticides in vegetables by cyclic steam distillation and capillary GC-ECD
This paper discusses the determination of residues of organochlorine pesticides in food, particularly in relation to developing countries where the routine screening of pesticide residues is hindered by the lack of pure solvents. An inexpensive and simple technique for the extraction of sixteen organochlorine pesticides and metabolites was studied in water, potato, tomato, banana, pineapple and cocoa. A modified cyclic steam distillation apparatus was constructed which only uses 15-20 ml iso-octane per extraction. For the majority of the compounds investigated extractions were quantitative even at trace levels, and for most crops the extracts were sufficiently clean to be injected directly into the GC-ECD without clean-up.
Bibliographic Reference: Article: Journal of Trace and Microprobe Techniques, Vol. 11 (1993) Nos. 1-3, pp. 133-142
Record Number: 199410021 / Last updated on: 1994-11-28
Original language: en
Available languages: en