电分析法检测药物中铋(Ⅲ)的含量  

Determination of Bismuth in drugs by electrochemistry method

作　　者：刘赵荣[1] 弓巧娟[1] 张稳婵[1] 孟莉新[1] 

机构地区：[1]运城学院应用化学系,山西运城044000

出　　处：《运城学院学报》2011年第5期39-41,63,共4页Journal of Yuncheng University

基　　金：山西省高校科技开发项目(200713033);运城学院博士启动基金

摘　　要：研究了Bi3+在碳糊电极上的阳极溶出伏安特性,结果表明:在1.0mol.L-1的HCl溶液中,于-0.055V处出现一灵敏的溶出峰,电极反应过程是受吸附控制的电极过程。并考察了测定Bi3+的最优化条件,在1.0mol.L-1的HCl溶液中,于0.4V富集80s后,以120mV/s扫描速度进行测定,结果表明:在1.0×10-7～1.0×10-4mol.L-1浓度范围内,Bi3+的溶出峰电流Ip与其呈良好的线性关系,检出限为6.0×10-8mol.L-1(信噪比RSN=3)。将该法应用于药物中铋含量的测定,回收率在99～102%,结果令人满意。The anodic stripping volt - ampere characteristic of Bi^3 ＋ on the carbon paste electrode was studied. The results show that there is a well defined stripping peak at -0.055V in the HCl solution（ 1.0mol L^-1）, and the electrode reaction is an adsorptioncontrolled process. In addition, we investigated the optimal condition of detecting Bi^3＋ . The performance was carried at the scan rate of 120mV/s in the HCI solution （ 1.0mol L^-1 ） after accumulating tbr 80s at 0.4V. The results show the calibration curve was linear in the Bi^3 ＋ concentration range of 1.0 × 10^-7 - 1.0×10 4 mol · L^-1 with a detection limit of 6.0 × 10 ^-8mol L 1 （ RsN = 3）. When the proposed method was applied in determining the content of Bi^3 ＋ in drugs, the results were satisfactory for that the recove was at 99% - 102%.

关 键 词：Bi3+ 阳极溶出伏安法 药物 

分 类 号：O657.15[理学—分析化学]