4-(2-噻唑偶氮)-1,3-二氨基苯分光光度法测定微量钴  

Spectrophotometric Determination of Microamounts of Cobalt with 4-(2-Thiazolylazo)-1,3-Diaminobenzene

作　　者：张光 韩权 

机构地区：[1]陕西师大化学系

出　　处：《冶金分析》1989年第3期11-13,共3页Metallurgical Analysis

摘　　要：本文对新试剂4-（2-噻唑偶氮）-1，3-二氨基苯与钴（Ⅱ）显色反应的适宜条件进行了系统研究。结果表明，在pH7.5¹0范围内，试剂与钴（Ⅱ）能定量显色，显色提高酸度至1.2M高氯酸溶液，测得配合物的最大吸收位于582nm,表观摩尔吸光系数eaat=8.84×10⁴。钴（Ⅱ）的浓度在0¹5ug/25ml范围内符合比尔定律。定法灵敏度高，选择性好，用于维生素B₁₂、含钴分子筛、铝合金及金川矿样中钴的测定，结果满意。A sensitive and selective spectrophotometric method for the determination of cobalt is based on the reaction of cobalt with TADAB to form a complex which is stable in a medium of 0.9-3.5 M perchloric acid. Its molar absorptivity is 8.84X104 at 582nm, The molar ratio of colalt to TADAB is 1:2. Beer's law is obeyed for 0-15g/25ml of Co. The method has been applied to determine microamount Co in samples containing Co with satisfactory results.

关 键 词：钴 金川矿样 分光光度法 铝合金 

分 类 号：TG146.16[一般工业技术—材料科学与工程]