氯化钾镉钴合金镀液中氯化钴的分光光度法测定  

Spectrophotometric determination of cobalt chloride in potassium chloride cadmium–cobalt alloy electroplating bath

作　　者：倪瀛尧 郭崇武 NI Yingyao;GUO Chongwu(LBS(Guangzhou)Company Limited,Guangzhou 510460,China)

机构地区：[1]莱比斯(广州)检测服务有限公司,广东广州510460 [2]广州超邦化工有限公司,广东广州510460

出　　处：《电镀与涂饰》2020年第2期96-97,共2页Electroplating & Finishing

摘　　要：在碱性条件下,用过硫酸铵将Co^2+离子氧化成Co^3+离子,用三乙烯四胺与Co^3+离子反应生成稳定的橙红色配合物,以分光光度法测定氯化钾镉钴合金镀液中氯化钴的含量。以镀液底色作为参比,在波长490 nm处测定试液的吸光度。分析结果的相对平均偏差为1.1%,回收率为98.3%~102.5%。Co^2+ ions are oxidized to Co^3+ ions by ammonium persulfate,and Co^3+ ions react with triethylenetetramine simultaneously forming stable orange-red complexes under the alkaline condition.The content of cobalt chloride in a potassium chloride Cd Co alloy electroplating bath is then determined by spectrophotometry.The absorbance of sample is determined at a wavelength of 490 nm with the electroplating solution as reference.The method has a relative average deviation of 1.1%and a recovery ranging from 98.3%to 102.5%.

关 键 词：氯化钾镉钴合金电镀 氯化钴 过硫酸铵 三乙烯四胺 分光光度法 

分 类 号：TQ153.2[化学工程—电化学工业] O655.25[理学—分析化学]