作　　者： ; ; (刘铠霞）;

机构地区： 广东工业大学轻工化工学院

出　　处： 《理化检验（化学分册）》 2002年第10期497-499,共3页

摘　　要： 在pH 5 .5溶液中 ,有溴化十六烷基三甲基铵存在下 ,钪 (Ⅲ )与乳酸及埃络青R(ECR)形成胶束混酸络合物 ,该络合物最大吸收波长为 5 90nm ,表观摩尔吸光系数ε =1.2 6× 10 5L·mol- 1·cm- 1。络合物的组成为钪 (Ⅲ )∶乳酸∶ECR =1∶1∶2。由于乳酸的存在 ,显色体系的灵敏度、选择性和稳定性都得到提高。用 1 苯基 3 甲基 4 苯甲酰基吡唑啉酮 5 (PMBP)分离干扰组分后 ,可测定钨矿及其浸出渣中的微量钪 。 It was found that in a hexamine buffer solution of pH 5.5, lactic acid (LA) acted as an assisting ligand in the color reaction of Sc(Ⅲ) and ECR in the presence of CTMAB, thus forming a mixed micellar ligand complex. The absorption maxina was found to lie at 590nm instead of 585nm in the absence of lactic acid. The apparent molar absorptivity achieved a value of 1.26×10 5L·mol -1·cm -1. The mole ratio of the mixed micellar ligand complex was found to be Sc(Ⅲ)∶LA∶ECR=1∶1∶2. Furthermore the sensitivity, selectivity and stability of the color reaction system were remarkably improved due to the presence of lactic acid. After a separation by extraction with PMBP, the above mentioned method has been applied to the determination of microamounts of scandium in tungsten ore and its extraction slags.

关 键 词： 溴化十六烷基三甲基铵 显色反应 应用 吸光光度法 钪 乳酸 埃络青 钨矿 浸出渣 微量分析 测定

领　　域： [理学] [理学] [天文地球] [天文地球]