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在ＨＡｃ－ＮａＡｃ介质中，以邻菲罗啉为活化剂，铜对抗坏血酸还原乙基橙具有强烈的催化作用，由此建立了测定痕量铜的催化动力学新方法，测定的线性范围为５～３０ｎｇ／ｍＬ，方法检出限为１．０ｎｇ／ｍＬ，直接用于人发中铜的测定，结果满意．
In the HAc-NaAc medium, using o-phenanthroline as activator, copper catalyzed the reduction of ethyl orange by ascorbic acid. A new catalytic kinetic method was established for the determination of trace copper. The linear range was 5 ~ 30ng / mL, the detection limit was 1.0ng / mL, which was directly used for the determination of copper in human hair with satisfactory results.