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高效液相色谱法测定萘哌地尔胶囊在犬的血药浓度及药物动力学

丁劲松, 蒋学华, 朱浩   

  1. 华西医科大学药学院, 成都 610041
  • 收稿日期:2000-03-10 修回日期:2000-06-23 出版日期:2000-12-15 发布日期:2000-12-15

Determination of Naftopidil in Dog Plasma by High Performance Liquid Chromatography and Study on Its Pharmacokinetics

Ding Jinsong, Jiang Xuehua, Zhu Hao   

  1. School of Pharmacy, West China University of Medical Sciences, Chengdu 610041
  • Received:2000-03-10 Revised:2000-06-23 Online:2000-12-15 Published:2000-12-15

摘要: 建立HPLC方法测定犬血浆中的萘哌地尔浓度,研究萘哌地尔胶囊在犬体内的药物动力学。单剂量给予5只健康犬萘哌地尔胶囊200 mg,血浆样品碱化后,经乙醚提取以乙腈(磷酸盐缓冲液0.05 mol·L-1的磷酸二氢钾溶液, 0.1 mol·L-1NaOH调节pH6.5)=60:40(v/v)为流动相, ODS C18分析柱分离测定,紫外230 nm为检测波长,维拉帕米为内标。线性范围为10 ng·mL-1~1200 ng·mL-1; 方法回收率为:100.23%±3.00%; 检测限: 8 ng·mL-1; 日间RSD≤5.56%,日内RSD≤3.30%。本法简便, 回收率和灵敏度高, 可用于萘哌地尔制剂的药动学研究。单剂量给予犬萘哌地尔胶囊200 mg后血药浓度随时间变化规律符合一级吸收一室模型, T1/2Ke3.19±1.27 h, Tmax1.15±0.49 h, Cmax697.48±94.22 ng·mL-1

关键词: 萘哌地尔, 高效液相色谱法, 药物动力学

Abstract: A simple, sensitive, accurate and rapid HPLC method for naftopidil determination in dog plasma or serum has been developed. Naftopidil was extracted from alkalinized plasma or serum with diethyl ether. The mobile phase consists acetonitrile and 0.05 mol·L-1 phosphate buffer (pH 6.5) (60:40). Verapamil was used as the internal standard and the eluate was monitored at 230 nm. The calibration curve of naftopidil was linear within the range of 10 ng·mL-1(1200 ng·mL-1. The recovery of this method is 100.23%±3.00%, within-day RSD and between-day RSD were no more than 3.30%, 5.56% respectively. The plasma drug concentration-time course in dogs after an oral single dose of 200 mg conformed to the one-compartment model. Mean T1/2Ke, Tmax, Cmax value were 3.19±1.27 h, 1.15±0.49 h, and 697.48±94.22 ng·mL-1 respectively.

Key words: Naftopidil, Naftopidil, HPLC, HPLC, Pharmacokinetics, Pharmacokinetics

Supporting: *Postgraduate in pharmaceutics of WCUMS. Present address, The 2nd Affiliated Hospital of Hu’nan Medical University Changsha 410011.