Abstract：
: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, alpha-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, alpha-endosulfan and chlorfenvinphos. We suggest that the method presented here be used for the extraction and quantitation of particle-associated polar pesticides.
journal_name
Chemospherejournal_title
Chemosphereauthors
Schäfer RB,Mueller R,Brack W,Wenzel KD,Streck G,Ruck W,Liess Mdoi
10.1016/j.chemosphere.2007.09.058subject
Has Abstractpub_date
2008-02-01 00:00:00pages
1952-60issue
11eissn
0045-6535issn
1879-1298pii
S0045-6535(07)01234-9journal_volume
70pub_type
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