选择性螯合滴定法测定酸铜镀液中的CuSO_4

Selective Chelatometric Determination of CuSO_4 in Copper Plating Solution

本文提出一种测定ＣｕＳＯ４含量的螯合滴定方法。该方法是在酸铜镀液中，加入过量的ＥＤＴＡ络合全部的金属离子，再用硫脲、抗坏血酸和１，１０－二氮杂菲选择性地分解Ｃｕ－ＥＤＴＡ。该方法有效地消除了镀液中Ｆｅ３＋、Ｚｎ２＋、Ａｌ３＋等杂质金属离子对测定结果的干扰，方法简便，结果准确，已被成功用于镀铜生产中ＣｕＳＯ４的测定。

A simple chelatometric method for determination of Cu2+ is presented. The process is based on initial complexation of Cu2+ Fe3+ Zn2+ Al3+ and other metal ions in solution with excessive amount of EDTA and subsequent decomposition of Cu-EDTA with thiourea, ascorbic acid, O-phenanthroline. The method has been successively used for determination of Cu2+ in copper sulfate plating bath.