Citation: LIU Jian-Chuan, ZHANG Hua, HUANG Hai-Chun, SHEN You-Qi, WANG Ya-Nan, ZHANG Xiao-Ping. Rapid Quantification Analysis of 3-hydroxybenzo[a]pyrene in Human Urine Using Magnetic Solid-phase Extraction Combined with Internal Extractive Electrospray Ionization Mass Spectrometry[J]. Chinese Journal of Analytical Chemistry, ;2019, 47(4): 634-639. doi: 10.19756/j.issn.0253-3820.181089
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Rapid and efficient strategy for detection of polycyclic aromatic hydrocarbons (PAHs) metabolites in human urine is urgently demanded in evaluation of internal exposure of PAHs. In this study, the combination of magnetic solid-phase extraction and internal extractive electrospray ionization mass spectrometry was used to rapid and high-throughput quantification of 3-hydroxybenzopyrene (3-OHBaP) in undiluted human urine samples. Polypyrrole-coated Fe3O4 magnetite (termed as Fe3O4@Ppy) was employed as the sorbent for MSPE of urinary 3-OHBaP in undiluted human urine samples, and then the material was treated as a bulk sample, which was directly analyzed by internal extractive electrospray ionization mass spectrometry (iEESI-MS). The signal intensity of m/z 239 was linearly related with 3-OHBaP concentration over the range of 0.0005-2.50 μg/L (R2=0.9989). The limit of detection (LOD) of 3-OHBaP in undiluted urine sample was 0.1 ng/L (S/N=3). The relative standard deviations (RSDs) for six replicate measurements of 3-OHBaP concentration were below 8.0%. The concentration of 3-OHBaP in urine of smoking volunteers was significantly higher than that of non-smoking volunteers. Remarkable sensitivity of urinary 3-OHBaP detection was provided by the proposed method, showing the potential application in evaluation of trace level internal dose of PAHs exposure of human beings.
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