Samuel E. Baker

TL;DR: The presence of its metabolites in the urine of U.S. residents indicates that children may have higher exposures to pyrethroid insecticides than adolescents and adults, and the presence of 3-phenoxybenzoic acid, a metabolite common to many pyrethoid insecticides, in more than 70% of the samples.

TL;DR: Although pentachlorophenol exposure is frequent, exposure appears to be decreasing, and reference range concentrations provide information about pesticide exposure and serve as a basis against which to compare concentrations in subjects who may have been exposed to pesticides.

TL;DR: A method for high-throughput analysis of 19 markers of commonly used pesticides in human urine, including seven specific metabolites of organophosphorus pesticides, five metabolites of synthetic pyrethroids, six herbicides or their metabolites, and one insect repellant is developed.

TL;DR: This method was used to measure urinary concentrations of these metabolites in persons with no known exposure to pyrethroids and some with suspected residential exposure, using stable isotopically labeled analogues of trans-DCCA and 3PBA as internal standards.

TL;DR: The detection of neonicotinoid metabolites more frequently and at much higher concentrations than the corresponding parent compounds suggests that the metabolites may be suitable biomarkers to assess background exposures.