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  • Development of multi-residue methods for pesticides in dry and dried foodstuffs using solvent or supercritical fluid extraction and gc detection


The third phase in the project is described. Phase 3 deals with the evaluation of multi-residue solvent extraction methods for 14 commodities and 63 pesticides. Each partner evaluated between 15 and 25 pesticides in four to six commodities using at least one solvent extraction method.

Two commodities, wheat and white rice and eight pesticides namely chloropyrifos-methyl, p, p' -DDE, p, p' -DDT, deltamethrin, dichloros, dimethoate, gamma-HCH and iprodione, were common for each partner.

Spiked materials were used to evaluate six extraction methods. Three of the methods were based on ethyl acetate extraction, and two methods were based on acetone/water or acetone/methanol extraction. The remaining method used hexane as the extraction solvent. Three partners used gel-permeation chromatography for clean-up, and one partner used no clean-up except liquid-liquid partition. Conventional detectors for pesticide analysis such as ECD, FPD, NPD and TSD, were used as well as mass spectrometric detectors based on quadruple and ion trap technology. gy.

Additional information

Authors: OSTERDAHL B G, National Food Administration, (SE);OLIN B, National Food Administration, (SE);VALVERDE A, Facultad de Ciencias Experimentales, University of Almeria (ES);DECLERCQ B, Laboratoire Interregional de la Repression des Fraudes, Massy (FR);NORMAN K N T, Central Science Laboratory, York (GB)
Bibliographic Reference: EUR 18956 EN, (1999) 109pp.
Availability: Available from OOPEC Sales agents
ISBN: ISBN 92-828-2247-8
Record Number: 199910998 / Last updated on: 1999-07-23
Original language: en
Available languages: en