Supercritical fluid extraction of selected pesticides from fortified soils and determination by gas chromatography with electron capture detection

J. L. Snyder Department of Chemistry, Villanova University, Villanova, PA, 19085; Lancaster Laboratories, Inc., 2425 New Holland Pike, Lancaster, PA, 17601

R. L. Grob Department of Chemistry, Villanova University, Villanova, PA, 19085

T. S. Oostdyk Department of Chemistry, Villanova University, Villanova, PA, 19085; Lancaster Laboratories, Inc., 2425 New Holland Pike, Lancaster, PA, 17601

M. E. McNally Department of Chemistry, Villanova University, Villanova, PA, 19085; E. I. du Pont de Nemours & Co., Inc., Agricultural Products, Experimental Station, Wilmington, DE, 19898

Abstract

Supercritical carbon dioxide mixed with 3% methanol was used to extract real‐world soil samples fortified with 12 selected organophosphate and organochlorine pesticides. Comparison of replicate supercritical fluid extractions (N=3) to classical sonication extractions (N=3) showed equivalent recoveries of the pesticides from four soil samples. The precisions for sonication extraction and SFE were also demonstrated to be identical.

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Notes

Present address: Lancaster Laboratories, Inc., 2425 New Holland Pike, Lancaster, PA 17601

Present address: E. I. du Pont de Nemours & Co., Inc., Agricultural Products, Experimental Station, Wilmington, DE 19898

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Supercritical fluid extraction of selected pesticides from fortified soils and determination by gas chromatography with electron capture detection

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Supercritical fluid extraction of selected pesticides from fortified soils and determination by gas chromatography with electron capture detection

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