【摘要】 基于在pH=3.0的H2SO4介质中,利用Fenton体系产生的羟基自由基能够与橙黄G发生反应,使其吸光度降低的原理,建立了一种在常温下测定H2O2浓度的催化光度分析新方法。在橙黄G最大吸收峰478nm波长处测得的吸光度降低值(△A)与H2O2浓度在0～100μmol/L范围内呈线性相关,检测限(S/N=3)为0.5μmol/L。该方法简单、方便、快捷,将其应用于雨水中微量H2O2的测定,结果满意。更多还原

【Abstract】 A new catalytic spectrophotometric method was developed for the determination of trace hydrogen peroxide based on the Fe(Ⅱ) catalyzed depletion of Orange G by hydrogen peroxide in the dilute H 2 SO 4 medium( pH=3.0).The decrease of absorbance of Orange G measured at its absorption maximum of 478nm( △A) was found to keep linear relationship with the concentration of hydrogen peroxide in the range of 0-100 μm ol/L with a detection limit of 0.5 μm ol/L( S/N=3).The proposed method was applied to the detection of hydrogen peroxide in rain water samples.更多还原