title: Evaluation of liquid chromatography-ion trap-time of flight hybrid mass spectrometry on the quantitative analysis for ginsenosides.
abstract: It is ideal and desirable for a single instrument to meet the requirement of both qualitative and quantitative analysis of complicated components in pharmacokinetic research for herbal medicine. Liquid chromatography combined with hybrid ion trap and time-of-flight mass spectrometry (LCMS-IT-TOF) was recently confirmed as a very powerful tool for the qualitative analysis of both target and nontarget components in herbal medicines. The present study was designed to investigate the feasibility of LCMS-IT-TOF on quantitative analysis of ginsenosides in biological matrices. A simple liquid-liquid extraction procedure was followed by injection of the extracts onto a C₁₈ column with gradient elution and detection based on LCMS-IT-TOF system in negative scan mode. The developed method was validated with respect to the limit of quantification, linear dynamic range, precision, accuracy, matrix effects and stabilities. All the results suggested that the presently developed method was sufficiently sensitive and robust enough to simultaneously monitor 15 ginsenosides with diverse properties and a large range of concentration differences. Therefore, this method would be expected to be highly useful for comprehensive studies of ginsenosides in complicated matrix.
authors.affiliation: State Key Laboratory of Natural Medicines, Key Laboratory of Drug Metabolism and Pharmacokinetics, China Pharmaceutical University, Tongjiaxiang 24, Nanjing, 210009, China.
authors.forename: Lu
authors.initials: L
authors.lastname: Xing
authors.forename: Lin
authors.initials: L
authors.lastname: Xie
authors.forename: Yan
authors.initials: Y
authors.lastname: Liang
authors.forename: Rong
authors.initials: R
authors.lastname: Xing
authors.forename: Tai
authors.initials: T
authors.lastname: Rao
authors.forename: Lijun
authors.initials: L
authors.lastname: Zhou
authors.forename: Qian
authors.initials: Q
authors.lastname: Wang
authors.forename: Hanxu
authors.initials: H
authors.lastname: Fu
authors.forename: Wei
authors.initials: W
authors.lastname: Ye
authors.forename: Guangji
authors.initials: G
authors.lastname: Wang
mesh_terms: D000818:Animals; D002853:Chromatography, Liquid / Q000379:methods*; D036145:Ginsenosides / Q000097:blood* / Q000737:chemistry / Q000302:isolation & purification / Q000493:pharmacokinetics; D016014:Linear Models; D059625:Liquid-Liquid Extraction; D008297:Male; D013058:Mass Spectrometry / Q000379:methods*; D051381:Rats; D017207:Rats, Sprague-Dawley; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
chemical_list: D036145:Ginsenosides
keywords: LCMS-IT-TOF; ginsenosides; herbal medicine; pharmacokinetics