title: Simultaneous determination of pyrethroid and pyrethrin metabolites in human urine by gas chromatography-high resolution mass spectrometry.
abstract: A new developed gas chromatographic-high resolution mass spectrometric method for the sensitive simultaneous determination of trans-chrysanthemumdicarboxylic acid, cis- and trans-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropane carboxylic acid, cis-3-(2,2-dibromovinyl)-2,2-dimethylcyclopropane carboxylic acid, 3-phenoxybenzoic acid and 4-fluoro-3-phenoxybenzoic acid in human urine is presented. These metabolites are biomarkers for an exposure to pyrethrum, allethrin, resmethrin, phenothrin, tetramethrin, cyfluthrin, cypermethrin, deltamethrin or permethrin. Therefore, with the help of this method for the first time a complete assessment of exposure to pyrethroid and pyrethrin insecticides is possible. After acid hydrolysis and extraction with tert-butyl-methyl-ether the residue is derivatized with 1,1,1,3,3,3-hexafluoroisopropanol and analyzed by GC/HRMS in electron impact mode (detection limits < 0.1 microg/l) as well as in negative chemical ionization mode (detection limit < 0.05 microg/l urine).
authors.affiliation: Department of SUA-GHA-GSS, Institute of Biological Monitoring, Bayer Industry Services GmbH and Co. OHG, Building L9, D-51368 Leverkusen, Germany. gabriele.leng.gl@bayerindustry.de
authors.forename: Gabriele
authors.initials: G
authors.lastname: Leng
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Gries
mesh_terms: D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D006801:Humans; D011722:Pyrethrins / Q000652:urine*; D012015:Reference Standards; D012680:Sensitivity and Specificity
chemical_list: D011722:Pyrethrins