title: Liquid chromatography-mass spectrometry method for the determination of nicardipine in human plasma.
abstract: A simple and sensitive liquid chromatography-mass spectrometry method is described for the determination of nicardipine in human plasma. Chromatographic separation of the analyte was achieved on a C(18) column using a mobile phase of methanol, water and formic acid (320:180:0.4, v/v/v). Selected ion monitoring (SIM) in positive mode was used for analyte quantification at m/z 480.2 for nicardipine and m/z 256.4 for diphenhydramine. The run time was less than 5 min. The linearity over the concentration range of 0.05-20.0 ng/ml for nicardipine was obtained and the lower limit of quantification was 0.05 ng/ml. For each level of QC samples, inter-day and intra-day precisions (R.S.D.) were < or =9.3 and 11.1%, respectively, and accuracy (RE) was +/-4.9%. The present LC-MS method was successfully applied in the pharmacokinetic studies of nicardipine hydrochloride delayed-release tablets in two formulations after oral administration to healthy volunteers.
authors.affiliation: Department of Chemistry, School of Science, Beijing Institute of Technology, China. mlqi@bit.edu.cn
authors.forename: Meiling
authors.initials: M
authors.lastname: Qi
authors.forename: Peng
authors.initials: P
authors.lastname: Wang
authors.forename: Xin
authors.initials: X
authors.lastname: Jin
mesh_terms: D002121:Calcium Channel Blockers / Q000097:blood* / Q000493:pharmacokinetics; D002853:Chromatography, Liquid / Q000379:methods*; D006801:Humans; D009529:Nicardipine / Q000097:blood* / Q000493:pharmacokinetics; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*
chemical_list: D002121:Calcium Channel Blockers; D009529:Nicardipine