Determination of 10 particle-associated multiclass polar and semi-polar pesticides from small streams using accelerated solvent extraction
Publikation: Beiträge in Zeitschriften › Zeitschriftenaufsätze › Forschung › begutachtet
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in: Chemosphere, Jahrgang 70, Nr. 11, 02.2008, S. 1952-1960.
Publikation: Beiträge in Zeitschriften › Zeitschriftenaufsätze › Forschung › begutachtet
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TY - JOUR
T1 - Determination of 10 particle-associated multiclass polar and semi-polar pesticides from small streams using accelerated solvent extraction
AU - Mueller, Ralf
AU - Brack, Werner
AU - Wenzel, Klaus-Dieter
AU - Streck, Georg
AU - Ruck, Wolfgang
AU - Liess, Matthias
AU - Schäfer, Ralf Bernhard
PY - 2008/2
Y1 - 2008/2
N2 - 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.
AB - 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.
KW - Chemistry
KW - Pressurized liquid extraction
KW - Suspended particles
KW - Size exclusion chromatography
KW - Deuterated internal standard
KW - Field study
KW - Analysis
UR - http://www.scopus.com/inward/record.url?scp=38849137998&partnerID=8YFLogxK
U2 - 10.1016/j.chemosphere.2007.09.058
DO - 10.1016/j.chemosphere.2007.09.058
M3 - Journal articles
C2 - 17991510
VL - 70
SP - 1952
EP - 1960
JO - Chemosphere
JF - Chemosphere
SN - 0045-6535
IS - 11
ER -