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- W2019913219 abstract "Phthalates are ubiquitous industrial chemicals with high potential for human exposure. Validated analytical methods to measure trace concentrations of phthalate metabolites in humans are essential for assessing exposure to phthalates. Previously, we developed a sensitive and accurate automated analytical method for measuring up to 16 phthalate metabolites in human urine by using on-line solid phase extraction coupled with isotope dilution–high performance liquid chromatography (HPLC)–electrospray ionization-tandem mass spectrometry. To include the measurement of seven additional analytes, including oxidative metabolites of diisononyl and diisodecyl phthalates, two chemicals used extensively in numerous consumer products, we used a novel nontraditional HPLC solvent gradient program. With this approach, we achieved adequate resolution and sensitivity for all 22 analytes with limits of detection in the low ng/mL range, without increasing the analytical run time. The method also has high accuracy with automatic recovery correction, high precision, and excellent sample throughput with minimal matrix effects. Although it is possible to measure these 22 phthalate metabolites with adequate precision and accuracy at sub-parts-per-billion levels, additional information, including toxicokinetic data, is needed to demonstrate the usefulness of these phthalate metabolites for exposure assessment purposes." @default.
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- W2019913219 date "2007-12-01" @default.
- W2019913219 modified "2023-10-04" @default.
- W2019913219 title "Quantification of 22 phthalate metabolites in human urine☆" @default.
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- W2019913219 doi "https://doi.org/10.1016/j.jchromb.2007.10.023" @default.
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