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LC-MS法测定人血浆中硝苯地平的浓度及其在药代动力学中的应用

张静, 宋浩静, 卜凡龙, 魏春敏, 袁桂艳, 刘晓燕, 王本杰, 郭瑞臣*   

  1. 1. 山东大学 齐鲁医院临床药理研究所, 山东 济南 250012
    2. 山东大学 药学院, 山东 济南 250012
  • 收稿日期:2010-05-23 修回日期:2010-10-15 出版日期:2010-11-30 发布日期:2010-11-30
  • 通讯作者: 郭瑞臣*

Determination of nifedipine concentration in human plasma by LC-MS and its application in pharmacokinetic study

Jing Zhang, Hao-Jing Song, Fan-Long Bu, Chun-Min Wei, Gui-Yan Yuan, Xiao-Yan Liu, Ben-Jie Wang, Rui-Chen Guo*   

  1. 1. Institute of Clinical Pharmacology, Qilu Hospital of Shandong University, Jinan 250012, China
    2. School of Pharmacy, Shandong University, Jinan 250012, China
  • Received:2010-05-23 Revised:2010-10-15 Online:2010-11-30 Published:2010-11-30
  • Contact: Rui-Chen Guo*

摘要:

了一种灵敏度高、重现性好的高效液相色谱-电喷雾质谱法 (ESI-LC-MS) 测定人血浆中硝苯地平浓的方法。采用液-液萃取法进行血浆样品预处理, 提取液为二氯甲烷, 内标选用尼群地平。色谱柱为Diamonsil ODS (150 mm×4.6 mm, 5 μm), 流动相为乙腈-5 mmol/L乙酸铵 (52:48, v/v), 流速1 mL/min。选用ESI离子源, 正离子模式, 选择性监测 (SIM)方式检测, 选择的离子[M+Na]+, 硝苯地平与内标的质核比(m/z)分别为369.0383.1, 碎片电压分别为110 V100 V。方法学验证表明方法特异性强、灵敏度高、准确度与精密度符合要求, 线性范围为(2-600) µg/L, 血浆样本经两次冻融及冷冻14内稳定, 可以用于硝苯地平的人体药代动力学研究。

关键词: 硝苯地平, LC-MS, 药代动力学

Abstract:

A sensitive and reproducible electro-spray ionization liquid chromatography-mass spectrometry (ESI-LC-MS) method was developed and validated to determine the concentration of nifedipine in human plasma. Following a simple liquid-liquid extraction with methylene chloride, nifedipine and nitrendipine (used as internal standard) were separated on a Diamonsil ODS column (150 mm×4.6 mm, 5 μm) by isocratic elution with acetonitrile-5 mmol/L ammonium acetate (52:48, v/v) at the flow rate of 1 mL/min, and detected by mass spectrometry in the selected ion monitoring (SIM) mode. The pseudomolecular ions [M+Na]+ (m/z 369.0 for nifedipine and 383.1 for nitrendipine) were selected as the target ions for quantification with fragment electric voltage of 110 V for nifedipine and 100 V for IS. Method validation demonstrated that the developed method had excellent specificity and sensitivity, and acceptable precision and accuracy. Good linearity was achieved over a wide range of (2-600) µg/L (r2>0.998). The plasma samples were stable after storing for more than 14 d and after two freeze-thaw cycles (-20 °C to 25 °C). The method was successfully applied to clinical pharmacokinetic studies of nifedipine.

Key words: Nifedipine, LC-MS, Pharmacokinetics

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*Corresponding author. Tel.: 86-531-82169636; fax: 86-531-86109975