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基于铜（Ⅱ）对刚果红溶液与紫外光发生光化学反应的催化作用，建立了测定痕量铜的新方法。线性范围０－０２ｕｇ／ｍｌ，相对标准偏差在０．４９％－３．８２％之间，标准加入回收率为９７％－１０３％。用环境土壤标准样品对照分析，结果与标准参考值相符。
Based on the catalytic effect of copper (Ⅱ) on the photochemical reaction of Congo red solution with ultraviolet light, a new method for the determination of trace copper was established. The linear range was 0 - 02 ug / ml, with relative standard deviations between 0.49% and 3.82%. The standard recoveries ranged from 97% to 103%. Soil samples with environmental control analysis, the results with the standard reference value.