掩蔽-双波长标准加入法测定镀镍溶液中钴  

DW-PHOTOMETRIC DETERMINATION OF COBALT IN NICKEL-PLATING SOLUTION

作　　者：陈维民[1] 苏会东[1] 梁岗[2] 

机构地区：[1]沈阳工业学院化工学院,沈阳110045 [2]泸州化工厂

出　　处：《理化检验（化学分册）》1999年第4期176-177,182,共3页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

摘　　要：提出一种掩蔽-双波长标准加入法。通过加入掩蔽剂氨三乙酸,使Ni(Ⅱ)与2-(5-溴-2-吡啶偶氮)-5-二乙氨基苯酚形成的配合物的吸光度降低,而对应的Co(Ⅱ)配合物的吸光度基本才变,从而提高了大量Ni(Ⅱ)存在下测定Co(Ⅱ)的准确度。用于测定镀镍溶液中的钴,结果满意。It is found that by the addition of the nitrilotriacetic acid (NTA) as masking agent, the absorption of the color complex Ni(Ⅱ)-5-Br-PADAP is remarkably lowered while that of the Co(Ⅱ)-5-Br-PADAP is not influenced. Based on this phenomenon, it is possible to determine the cobalt content in Ni-plating solution. Satisfactory results are obtained.

关 键 词：双波长标准加入 钴 掩蔽 测定 镀镍溶液 

分 类 号：TQ153.12[化学工程—电化学工业]