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1-(2-吡啶偶氮)-2萘酚(PAN)和Cu~(2+)所形成的红色络合物经溶剂萃取后可用于微量铜的测定,我们进一步研究了PAN-CPB(十六烷基溴化吡啶)-铜的显色反应,在0.01～0.1N的盐酸溶液中迅速形成水溶性络合物并非常稳定。方法可应用于测定锌合金及铝合金中微量铜。在锌合金和铝合金中,除主体元素外。一般还有
The red complex formed by 1- (2-pyridylazo) -2-naphthol (PAN) and Cu 2+ can be used for the determination of trace copper after solvent extraction. We further studied the effect of PAN-CPB Hexadecylpyridinium bromide) - copper, the formation of a water-soluble complex in a 0.01 to 0.1 N hydrochloric acid solution is very stable. The method can be applied to the determination of trace copper in zinc alloy and aluminum alloy. In zinc alloy and aluminum alloy, in addition to the main elements. Generally there