title: Determination of 1-hydroxypyrene in human urine by acid hydrolysis coupled to solid-phase microextraction and semi-microcolumn liquid chromatography.
abstract: This study developed an acid hydrolysis coupled to a solid-phase microextraction method employing a semi-microcolumn liquid chromatography system, instead of enzyme hydrolysis with solid-phase extraction for the pretreatment of human urine samples, to detect urinary 1-hydroxypyrene (1-OHP). The complete separation and detection of urinary 1-hydroxyprene was performed using a high-performance liquid-chromatography fluorescence detection system with an analytical C(18) semi-microcolumn, 60% (v/v) aqueous acetonitrile elution, and a lambda(ex/em) = 348/388 nm pair detection wavelength. Calibration graphs were linear with very good correlation coefficients (r = 0.9997), and the detection limit was 1.0 ng/L. These important parameters for acid hydrolysis and solid-phase microextraction were investigated. The total recovery was above 83% in acid hydrolysis with solid-phase microextraction. The proposed method provided a relatively simple, convenient, and practical procedure to determine the level of urinary 1-hydroxypyrene in biological samples, and was successfully applied to detect the urine of students.
authors.affiliation: Departmant of Environmental Engineering and Health, Yuanpei University of Science and Technology, Hsinchu 300, Taiwan, R. O. C. hwchen@mail.ypu.edu.tw
authors.forename: Hong-Wen
authors.initials: HW
authors.lastname: Chen
mesh_terms: D000143:Acids / Q000737:chemistry; D002853:Chromatography, Liquid / Q000379:methods*; D006801:Humans; D006863:Hydrogen-Ion Concentration; D006868:Hydrolysis; D009994:Osmolar Concentration; D011721:Pyrenes / Q000032:analysis*; D052616:Solid Phase Extraction / Q000379:methods*; D013997:Time Factors; D014556:Urine / Q000737:chemistry*
chemical_list: D000143:Acids; D011721:Pyrenes; C033146:1-hydroxypyrene