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[求助] 求助EDTA络合滴定法测铜离子浓度的过程

如题,我是做高分子的,好久没做无机了。最近想做个对重金属离子的吸附,拓展一下方向,由于没有分光光度计,所以先用EDTA络合滴定法试一试。看看络合滴定的效果好否。。我查了很多资料、文献,都没有看到一个完整的方法,如能提供具体的变色过程,不胜感激。我买的是PAN指示剂
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