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研究了在稀H2SO4介质中，Zn2＋催化H2O2氧化邻苯三酚红的褪色反应。借此建立了测定痕量锌的催化光度法。方法的线性范围为0～0.50μg／25mL，检测限为2.8×10-11g Zn2＋／mL。该法的灵敏度高，重复性好，用于测定人发中痕量锌时，结果满意。“,”In the medium of dilute H2SO4, the fading reaction of pyrogallol red is oxdized by H2O2, which can be catalyzed by Zn2+ has been studied. A new method for the catalytic spectrophotometric determination of trace zinc has been developed. The linear range is 0-0.50μg Zn2+/25mL and the detection limit is 2.8×10-11g/mL. The proposed method has high sensitivity and good repeatability and has been used to determine trace zinc in human hair with satisfactory results.