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- W2952334701 abstract "While 3-hydroxybenzo[a]pyrene (3-OHBaP) is a preferable biomarker to assess human exposure to benzo[a]pyrene (BaP), a sensitive and simple method is lacking. In this study, a specific and sensitive method based on liquid chromatography coupled with electrospray tandem mass spectrometry (LC-ESI-MS/MS) was developed for direct analysis of 3-OHBaP glucuronide and sulfate conjugates in human urine samples without enzymatic hydrolysis. The limits of detection (LODs) were 0.06 ng L-1 for BaP-3-sulfate (BaP-3-S) and 0.16 ng L-1 for BaP-3-glucuronide (BaP-3-G), which showed high sensitivity. Both compounds showed excellent linearity (r2 > 0.99) in the range of 0.01-10 μg L-1 in the instrumental calibration. The absolute recoveries of the target analytes spiked in human urine for the entire analytical procedure were 68.3 ± 4.96% (mean ± SD) and 63.7 ± 5.47% for BaP-3-S and BaP-3-G, respectively. This method was applied to quantify BaP-3-G and BaP-3-S in 150 urine samples collected from healthy volunteers. The mean concentration of BaP-3-S was 0.67 ng g-1 creatinine (<LOD to 10.20 ng g-1 creatinine), about 10-fold lower than that of BaP-3-G (6.73 ng g-1 creatinine, < LOD to 52.64 ng g-1 creatinine). For comparison, we also detected the concentration of free 3-OHBaP in 15 randomly selected samples without enzymatic hydrolysis and found at least >98% of 3-OHBaP is excreted mainly in these two conjugated forms in human urine. A statistically significant positive association was observed between urinary 3-OHBaP conjugates and urinary 8-OHdG levels (p < 0.001) in the general population. This study developed a sensitive and simple method to determine urinary glucuronide/sulfate conjugated BaP metabolites and for the first time found that BaP exposure associated with 8-OHdG levels in the general population." @default.
- W2952334701 created "2019-06-27" @default.
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- W2952334701 date "2019-06-17" @default.
- W2952334701 modified "2023-10-10" @default.
- W2952334701 title "Determination of 3-Hydroxybenzo[a]pyrene Glucuronide/Sulfate Conjugates in Human Urine and Their Association with 8-Hydroxydeoxyguanosine" @default.
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- W2952334701 doi "https://doi.org/10.1021/acs.chemrestox.9b00025" @default.
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