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本文研究了在氨水介质中，铜（Ⅱ）催化过氧化氢氧化苯酚红褪色的新指示反应。据此建立了催化褪色光度法测定痕量铜的新方法。本方法检出浓度为８．０×１０￣（－１０）ｇＣｕ￣（２＋）／ｍｌ，测定范围为０．３～１．１μｇＣｕ￣（２＋）／２５ｍｌ。用于钢铁样品中微量铜的测定获得了满意的结果。
In this paper, a new reaction of copper (Ⅱ) catalyzed hydrogen peroxide oxidation of phenol red in aqueous medium was studied. A new method for the determination of trace copper by catalytic fading spectrophotometry was established. The detection limit of this method was 8.0 × 10 -10 gCu ~ (2 +) / ml and the determination range was 0.3 ~ 1.1 μg Cu ~ (2 +) / 25 ml. Satisfactory results have been obtained for the determination of trace copper in steel samples.