EDTA容量法直接测定酸铜镀液中的锌杂质  

Direct Determination of Zinc Impurity in Acid Copper Plating Bath with EDTA Volumetry

作　　者：董荟文 郭崇武[2] 

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 [2]广州超邦化工有限公司,广东广州510460

出　　处：《电镀与环保》2014年第3期38-39,共2页Electroplating & Pollution Control

摘　　要：制定了酸铜镀液中锌杂质的直接测定方法。用氢氧化钠沉淀并分离酸铜镀液中的铜离子及铁和镍杂质,在pH=10的条件下,加氟化铵掩蔽铝,以Cu-PAN作指示剂,用EDTA标准溶液滴定锌。试验表明:本法的相对平均偏差为0.4%,回收率为99.3%。本法简单、准确,优于其他方法。A method for direct determination of zinc impurity in acid copper plating bath was established.The copper ions as well as iron and nickel impurities in acid copper plating bath were precipitated and separated with sodium hydroxide,and under the condition of pH =10,aluminum impurities were sheltered by adding ammonium fluoride,and zinc impurities were titrated by means of EDTA volumetry with Cu-PAN as indicator.The experiments show that the relative average deviation of this method is 0.4 ％,and the recovery rate is 99.3 ％.This method is simple,accurate,superior to other methods.

关 键 词：酸铜镀液 锌杂质 沉淀分离 EDTA容量法 

分 类 号：TG115.313[金属学及工艺—物理冶金]