title: Rapid and sensitive analysis of parishin and its metabolites in rat plasma using ultra high performance liquid chromatography-fluorescence detection.
abstract: A simple, rapid and sensitive ultra high performance liquid chromatography with fluorescence detection (UHPLC-FLD) method was developed and validated for quantification of parishin and its metabolites in rats. Plasma samples were prepared by protein precipitation and then analyzed using UHPLC-FLD system. Repeated optimization showed that parishin and its metabolites, including gastrodin, p-hydroxybenzyl alcohol, parishin B and parishin C, could be sensitively detected based on the autofluorescence when excitation and emission wavelengths were set at 225nm and 295nm, respectively. The limit of detections (LODs) of GAS, HBA, PB, PC and PA reached 0.6, 0.8, 1, 1 and 1ng/mL, respectively. The linearity for all targets was within the range 2.5-5000ng/mL and the correlation coefficient (r2) was larger than 0.999. Importantly, our method was almost free from matrix effects and the recoveries were higher than 80%. Additionally, our method also had high precision and accuracy for all analytes, presenting RSDs and REs within ±6% and ±14%, respectively. Finally, the validated UHPLC-FLD method was successfully applied for studying the pharmacokinetics of parishin following intragastrically administration in rats.
authors.affiliation: Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Science, Dalian 116023, China.
authors.forename: Chunlan
authors.initials: C
authors.lastname: Tang
authors.affiliation: Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Science, Dalian 116023, China.
authors.forename: Li
authors.initials: L
authors.lastname: Wang
authors.affiliation: Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Science, Dalian 116023, China.
authors.forename: Mengchun
authors.initials: M
authors.lastname: Cheng
authors.affiliation: Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Science, Dalian 116023, China.
authors.forename: Xiaozhe
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Science, Dalian 116023, China.
authors.forename: Xiaoyan
authors.initials: X
authors.lastname: Liu
authors.affiliation: Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Science, Dalian 116023, China. Electronic address: hbxiao@dicp.ac.cn.
authors.forename: Hongbin
authors.initials: H
authors.lastname: Xiao
keywords: Metabolites; Parishin; Pharmacokinetics; UHPLC-FLD