Determination of 10 particle-associated multiclass polar and semi-polar pesticides from small streams using accelerated solvent extraction

Publikation: Beiträge in ZeitschriftenZeitschriftenaufsätzeForschungbegutachtet

Authors

A new analytical method using accelerated solvent extraction was developed for the determination of 10 particle-associated polar and semipolar pesticides. In addition, six deuterated analogues of the target compounds were evaluated as internal standards. The method yielded acceptable accuracy (73-103% recovery) and precision (<25% relative standard deviation) for eight compounds. Using size exclusion chromatography (SEC) as cleanup step resulted in higher recoveries compared to solid phase extraction (SPE) cleanup. Deuterated standards with 10 or more deuterium atoms performed well as internal standards concerning similar recovery and correlation with the target analytes. The method was employed to extract particle-associated pesticides from 16 streams located in an area with intense agriculture in France. Acetochlor, pirimicarb, tebuconazole, fenpropidin, α-endosulfan and chlorfenvinphos were detected at concentrations up to 1 mg kg -1 dry weight. A comparison with aquatic toxicity data indicated potential risk to the benthic fauna exposed to these concentrations of pirimicarb, α-endosulfan and chlorfenvinphos. We suggest that the method presented here be used for the extraction and quantitation of particle-associated polar pesticides.

OriginalspracheEnglisch
ZeitschriftChemosphere
Jahrgang70
Ausgabenummer11
Seiten (von - bis)1952-1960
Anzahl der Seiten9
ISSN0045-6535
DOIs
PublikationsstatusErschienen - 02.2008

DOI

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