测定柠檬酸盐镀镍溶液中硫酸镍的新方法  

Novel method for determining the content of nickel sulfate in a citrate nickel electroplating bath

作　　者：吴梅娟 郭崇武[1] 李小花 陈建锐 WU Meijuan;GUO Chongwu;LI Xiaohua;CHEN Jianrui(Guangzhou Ultra Union Chemicals Ltd.,Guangzhou 510460,China;不详)

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

出　　处：《电镀与涂饰》2020年第5期295-297,共3页Electroplating & Finishing

摘　　要：以三乙醇胺掩蔽铝和铁杂质,加氨水调节pH至12.0~12.8,以紫脲酸铵作为指示剂,用EDTA标准溶液滴定柠檬酸盐镀镍溶液中的镍离子。通过提高p H,有效消除了柠檬酸盐对测定的影响,测定结果的相对标准偏差为0.21%,回收率为99.71%~100.25%。The aluminum and iron impurities in a citrate nickel electroplating bath are masked by triethanolamine,and the ammonia is added to adjust the pH of the test solution to 12.0-12.8.The nickel ions are then titrated by EDTA standard solution with murexide as indicator.The influence of citrate on the determination is effectively eliminated by increasing the pH.The method features a relative standard deviation of 0.21%and a recovery ranging from 99.71%to 100.25%.

关 键 词：柠檬酸盐镀镍溶液 镍含量 碱度 乙二胺四乙酸 滴定法 

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