钨镍铁钴合金中微量钴的快速测定  

Rapid spectrophotometric determination of micro cobalt in W-Ni-Fe-Co alloy with 5-Cl-PADAB

作　　者：吴岩青 郭润秀 

机构地区：[1]兵器工业西北理化检测中心,陕西西安710043 [2]西安秦川机械厂,陕西西安710043

出　　处：《冶金分析》2001年第3期54-55,共2页Metallurgical Analysis

摘　　要：探讨了大量钨及少量镍、铁、锰存在下 ,5 Cl PADAB与Co(Ⅱ)的显色反应条件。在 pH6 0～ 8 0范围内 ,Co(Ⅱ)与 5 Cl PADAB形成稳定的紫红色络合物 ,其最大吸收波长为 5 70nm ,摩尔吸光系数ε =1 0× 10 5 。钴量在 0～ 2 5 μg/5 0mL符合比尔定律。方法用于钨镍铁钴合金中钴量的测定 。The conditions of coloured reaction for cobalt with 4 [(5 chloro 2 pyridyl) azo] 1,3 diamino benzene (5 Cl PADAB) under the presence of macro amounts of tungsten and micro amounts of nickel, iron, and manganese have been investigated. The absorption peak of the complex is at 570nm. The molar absorptivity is 1.0×10 5. Beer's law is obeyed in the range of 0-25μg/50ml for Co. The method has been applied satisfactorily to the determination of the trace cobalt in W Ni Fe Co Alloy.

关 键 词：钨镍铁钴合金 钴 5-Cl-PADAB 分光光度法 测定 

分 类 号：O657.3[理学—分析化学]