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Environmentally friendly determination of urinary trans, trans-muconic acid for biological monitoring of benzene exposure by green high-performance liquid chromatography
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
2012, v.25 no.6, pp.460-466
https://doi.org/10.5806/AST.2012.25.6.460
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(2012). Environmentally friendly determination of urinary trans, trans-muconic acid for biological monitoring of benzene exposure by green high-performance liquid chromatography. Analytical Science and Technology, 25(6), 460-466, https://doi.org/10.5806/AST.2012.25.6.460
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Abstract
An environmentally friendly, so-called green, high performance liquid chromatography method was developed and validated for the determination of trans, trans-muconic acid (t,t-MA) in human urine as a biomarker of benzene exposure. After urinary t,t-MA was extracted and enriched using solid-phase extraction, a MF-Ph1 SG80(150 mm×2.0 mm I.D., 5 μm) column with a mobile phase of 10 mM KH2PO4 containing 0.1% H3PO4 was used for isocratic separation of t,t-MA with UV detection at 259 nm. The calibration curve was constructed in the range of 0.1-5.0 mg/L with good linearity (r2=0.9992). The intra-day and inter-day precision (as RSD) were 0.9-8.5%and 3.1-4.5%, respectively. The average recovery ranged from 97.5% to 101.7%. The green sample preparation and separation with no organic solvents were successfully achieved. The validated method would be suitable for the routine biological monitoring of benzene exposure in the occupational settings.
- keywords
- green high performance liquid chromatography, trans, trans-muconic acid, benzene, biological monitoring, HPLC-UV
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