偶氮氯膦mA与铋显色反应研究及其应用  

Colour Reaction of Bismuth with Chlorophosphoazo mA and its Application

作　　者：任吉存[1] 李善祥[1] 熊少祥[1] 汪学明 

机构地区：[1]安庆师范学院化学系

出　　处：《冶金分析》1989年第4期22-24,共3页Metallurgical Analysis

摘　　要：偶氮氯膦mA与铋在0.05M硫酸介质中能形成稳定的络合物。该反应具有较高的灵敏度和选择性。其表现摩尔吸光系数(ε070)为5.7×10~4。本文通过水合二氧化锰共沉淀分离富集铜合金中痕量铋后,用偶氮氯膦mA直接光度法测定铋的含量。其方法操作简单,结果准确。In a solution of 0.05M sulfuric acid, the blue complex is formed by the reaction of bismuth with chlorophosphoazo mA. It was found to have high stability, high sensitivity and good selectivity.The absorption maximun is at 670nm. The apparent molar absorption coefficient of the complex is 5.7x 104. Bismuth in copper alloy was concentrated and separated by addtion of hydrated manganes dioxide as a copreciptating agent and then determined by the spectrophotometric method with chlorophosphoazo mA. The method is simple and accurate.

关 键 词：铋 光度法测定 偶氮氯膦 显色反应 

分 类 号：O614.532[理学—无机化学]