由于修饰在电极上的螯合树脂与铜离子在进行离子交换的同时发生螯合反应，故本法具有较好的选择性和较高的灵敏度。
As the chelating resin in the electrode can exerts a concerted effect of ion exchange and coordination with copper, this method produces a high sensitivity and selectivity.
证明在多种金属离子共存的复杂溶液体系中，可以避免其它离子的干扰，使铜选择性地富集到金电极表面。
It is found that the deposition of the Cu 2+ on Au electrode possesses very good selectivity to a more complex solution system containing many other metal ions.
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