title: Simple, sensitive and rapid LC-MS method for the quantitation of indapamide in human plasma--application to pharmacokinetic studies.
abstract: A sensitive and specific method using liquid chromatography with electrospray ionization mass spectrometry (LC-ESI-MS) has been developed and validated for the identification and quantification of indapamide in human plasma. A simple liquid-liquid extraction procedure was followed by injection of the extracts on to a C18 column with gradient elution and detection using a single quadrupole mass spectrometer in selected ion monitoring (SIM) mode. The method was tested using six different plasma batches. Linearity was established for the concentration range 0.5-100.0 ng/ml, with a coefficient of determination (r) of 0.9998 and good back-calculated accuracy and precision. The intra- and inter-day precision (RSD%) was lower than 10%, and accuracy ranged from 85 to 115%. The lower limit of quantification was reproducible at 0.2 ng/ml with 0.2 ml plasma. The proposed method enables the unambiguous identification and quantification of indapamide for pre-clinical and clinical studies.
authors.affiliation: Key Lab of Drug Metabolism & Pharmacokinetics E04#, China Pharmaceutical University, 1 Shennong Road, Nanjing 210038, and The hospital of the 17(th) metallurgical construction company, Maanshan 243000, China.
authors.forename: Wei-Dong
authors.initials: WD
authors.lastname: Chen
authors.forename: Yan
authors.initials: Y
authors.lastname: Liang
authors.forename: Hong
authors.initials: H
authors.lastname: Zhang
authors.forename: Hao
authors.initials: H
authors.lastname: Li
authors.forename: Ye
authors.initials: Y
authors.lastname: Xiong
authors.forename: Guang-Ji
authors.initials: GJ
authors.lastname: Wang
authors.forename: Lin
authors.initials: L
authors.lastname: Xie
mesh_terms: D000959:Antihypertensive Agents / Q000097:blood* / Q000493:pharmacokinetics; D002138:Calibration; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D018592:Cross-Over Studies; D006801:Humans; D007190:Indapamide / Q000097:blood* / Q000493:pharmacokinetics; D008297:Male; D012015:Reference Standards; D012680:Sensitivity and Specificity
chemical_list: D000959:Antihypertensive Agents; D007190:Indapamide