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- W2065309367 abstract "The aim of this study was to develop a method for quantitative measurement of urinary metabolites of pyrethroid (PYR) insecticides, trans-chrysanthemumdicarboxylic acid (CDCA) and 3-phenoxybenzoic acid (3-PBA), extracted from disposable diapers. This study was approved by the university ethics committees, and informed consent was obtained from all the parents for their children and from adult volunteers. After extraction of PYR metabolites in the absorber of diapers with 5 ml acetone, the metabolites in the eluents were extracted with tert-butyl methyl ether, derivatized with 1,1,1,3,3,3-hexafluoroisopropanol and analyzed by gas chromatography–mass spectrometry. The limits of quantitation (LOQs) were 0.55 μg/l for CDCA and 0.09 μg/l for 3-PBA in 2 ml urine extracted from diapers. Within-series and between-day precisions were <14% (CV%) over the concentration range of metabolites from 0.4 to 20.4 μg/l urine. When concentrations of each metabolite were measured with the developed method after pouring 2 ml urine, which was obtained from adults both in a general population and pest control operators, on diapers, good correlations were shown between the measured results and the concentrations measured directly for the respective urine with the conventional method (Spearman’s rank correlation coefficient 0.889 for CDCA and 0.989 for 3-PBA; n=27–28). The developed method would be applicable to epidemiological studies." @default.
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- W2065309367 date "2013-06-12" @default.
- W2065309367 modified "2023-10-13" @default.
- W2065309367 title "A non-invasive biomonitoring method for assessing levels of urinary pyrethroid metabolites in diapered children by gas chromatography–mass spectrometry" @default.
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- W2065309367 doi "https://doi.org/10.1038/jes.2013.31" @default.
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