title: Determination of aconitine, hypaconitine and mesaconitine in urine using hollow fiber liquid-phase microextraction combined with high-performance liquid chromatography.
abstract: Hollow fiber liquid-phase microextraction (HF-LPME) coupled with high-performance liquid chromatography was used to simultaneously determine three Aconitum alkaloids, including aconitine (AC), hypaconitine (HA) and mesaconitine (MA) in human urine sample. Analytes were extracted from 5mL urine sample containing 1.0mmol/L NaOH into 1-octanol membrane phase impregnated in the pores of hollow fiber wall, and then back extracted into acidified aqueous solution in the lumen of the hollow fiber. After extraction, 10μL of the acceptor phase was analyzed directly by HPLC. In this method, some important extraction parameters, such as organic solvent, extraction time, stirring rate, pH of donor phase and acceptor phase, temperature, and the volume of acceptor phase were optimized. This method provided 98- to 288-fold enrichment factors within 60min of extraction and good repeatability with RSDs of 0.99-7.22%. The calibration curves were linear over the ranges of 16.0-128.0μg/L for AC, 11.0-88.0μg/L for HA and 8.1-64.8μg/L for MA in human urine sample, with correlation coefficients of 0.9949, 0.9969 and 0.9904, respectively. Limits of detection were from 0.7 to 1.5μg/L, and recoveries from spiked urine sample varied from 84.4% to 106.2% for AC, 77.3% to 85.6% for HA and 90.1% to 100.8% for MA.
authors.affiliation: Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, No. 18, Tianshui Middle Road, Lanzhou 730000, People's Republic of China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Yang
authors.forename: Juan
authors.initials: J
authors.lastname: Chen
authors.forename: Yan-Ping
authors.initials: YP
authors.lastname: Shi
mesh_terms: D000157:Aconitine / Q000031:analogs & derivatives* / Q000737:chemistry / Q000652:urine*; D031841:Aconitum; D000470:Alkaloids; D005591:Chemical Fractionation / Q000379:methods*; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D006801:Humans; D006863:Hydrogen-Ion Concentration; D016014:Linear Models; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013696:Temperature
chemical_list: D000470:Alkaloids; C058309:hypaconitine; C019470:mesaconitine; D000157:Aconitine