差分脉冲伏安法测定卡托普利  

Determination of Captopril by Using Differential Pulse Voltammetry

作　　者：杜虹[1] 刘会[1] 赵常志[1] 

机构地区：[1]青岛科技大学化学与分子工程学院,山东青岛266042

出　　处：《分析科学学报》2011年第3期355-358,共4页Journal of Analytical Science

基　　金：山东省自然科学基金(No.ZR2009BM010)

摘　　要：本文基于金电极表面对巯基化合物的吸附作用,提出了一种简便灵敏的测定抗高血压药物卡托普利的新方法。研究了卡托普利在金电极上的伏安响应,优化了差分脉冲伏安法测定卡托普利的实验条件。研究结果表明:在0.217～3.04mg/L的范围内,卡托普利的氧化峰电流与其浓度呈良好的线性关系,检出限为0.152mg/L。测定药物中卡托普利的相对标准偏差小于2.41%,加标回收率为96.5%～101%。A simple and sensitive electrochemical method was described by using differential pulse voltammetry for the determination of captopril（CPT）.The method was based on the adsorption and oxidation of CPT at a gold electrode.The electrochemical behavior of CPT on the electrode was investigated with cyclic voltammetry and differential pulse voltammetry.Under the optimized experimental conditions,the voltammetric response was proportional to the concentration of CPT over the range from 0.217 to 3.04 mg/L with a correlation coefficient of 0.9991,and the detection limit was estimated to be 0.152 mg/L at a signal/noise ratio of 3.The relative standard deviation was less than 2.41%（n=5） and the recovery was in the range of 96.5%~101% for the determination of CPT in pharmaceutical samples.

关 键 词：卡托普利 金电极 差分脉冲伏安法 

分 类 号：O657.15[理学—分析化学]