镍-铁合金镀液中硫酸镍分析方法的改进  

Improvement of Analysis Method of Nickel Sulfate in a Ni-Fe Alloy Plating Bath

作　　者：郭崇武 

机构地区：[1]肇庆市华良金属精饰制品有限公司,广东肇庆526105

出　　处：《电镀与精饰》2010年第7期42-43,共2页Plating & Finishing

摘　　要：改进了镍-铁合金镀液中硫酸镍分析方法。用双氧水将Fe2+离子氧化成Fe3+离子,用三乙醇胺掩蔽铁,用EDTA测定硫酸镍。在pH=10的条件下用紫脲酸铵作指示剂进行滴定。相对平均偏差为0.12%。方法简单,快速而准确。The analysis methods of nickel sulfate in a Ni-Fe alloy plating bath were improved.The concentration of nickel sulfate was measured by EDTA volumetry.During the determinations,the ferrous ions were oxidized to trivalent iron ions by using hydrogen peroxide,and the trivalent iron ions were masked with triethanolamine.The titration was carried out under a condition of pH = 10 with murexide as an indicator.The relative average deviation of the method is 0.12% .The method is simple,rapid and accurate.

关 键 词：镍-铁合金镀液 硫酸镍 铁离子 三乙醇胺 掩蔽剂 EDTA容量法 

分 类 号：TQ153.3[化学工程—电化学工业]