偶氮氯膦-Ⅲ分光光度法测定铋  

Spectrophotometric Determination of Bismuth Using Chlorophosphonazo-Ⅲ

作　　者：刘恒[1] 翟庆洲[1] 胡伟华[1] 李明英[1] 

机构地区：[1]长春理工大学纳米技术研究中心,吉林长春130022

出　　处：《湿法冶金》2015年第6期524-526,共3页Hydrometallurgy of China

摘　　要：研究了偶氮氯膦-Ⅲ（CPA-Ⅲ）分光光度法测定铋（Ⅲ）。在2.6mol/L高氯酸介质中及有表面活性剂聚乙烯醇存在条件下,铋（Ⅲ）与CPA-Ⅲ形成1∶2的紫红色配合物,该配合物的最大吸收波长为516nm,表观摩尔吸光系数ε516nm=1.12×10^5 L·mol^-1·cm^-1,铋（Ⅲ）质量浓度在0~0.7μg/mL范围内符合比尔定律,方法检出限为0.27μg/mL。该方法已成功用于测定胃药中的铋。A spectrophotometric determination of bismuth （ Ⅲ ） using chlorophosphonazo- Ⅲ （CPA- Ⅲ） as color agent was studied. In 2.6 mol/L perchlorate acid medium and in the presence of polyvinyl alcohol,bismuth （Ⅲ） with CPA-Ⅲ forms a 1 ： 2 purple-red complex. The maximum absorption wavelength of the complex is 516 nm, and the apparent molar absorptivity is 1.12 ×10^5 L/（mol ·cm）. Beer＇s law is obeyed in the range of 0--0.7 μg/mL for bismuth（ Ill ）. The detection limit of the method is 0. 27 μg/mL. This method was successfully used in the determination of bismuth in stomach medicine.

关 键 词：铋 分光光度法 偶氮氯膦-Ⅲ 

分 类 号：R927[医药卫生—药学] O657.32[理学—分析化学]