催化动力学分光光度法测定微量铅的研究

Study on Kinetic Sepectrophotometry Determination of Trace Lead

本文报道在NH3 NH4Cl介质中,利用铅催化H2O2氧化胭脂红腿色这一反应,建立催化动力学光度法测定微量铅的新方法。方法的检出限为0.091μg/25mL,线性范围0.10～0.90μg/25mL,用于分析汽油中的铅,结果满意。

A kinetic sepectrophotometry for the determination of trace lead was reported in this paper. It is based on Pb^(2+) catalyze the decoloration of carmine by H_2O_2 in NH_3-NH_4Cl medium. The linear range of method is 0.10～(0.90) μg/25 mL,and the detection limit is 0.091 μg/25 mL. The method has been used to determine trace Pb^(2+) in gasolime with satisfactory results.