摘要
在表面活性剂Tween-80存在下，在酸性介质中，痕量Al（Ⅲ）能灵敏地催化H2O2氧化甲基紫的褪色反应。通过研究该反应的最佳条件、动力学参数和机理，建立了催化动力学光度法测定痕量Al（Ⅲ）的新体系。方法的检出限为2．247×10^-10g·mL^-1，测定线性范围为0～0．8μg／25mL。其方法的选择性高，重现性好，一定量的常见离子不干扰测定，用于测定人发、豆样和水样中Al（Ⅲ），均获得满意结果。
It has been observed that trace aluminum （Ⅲ） can sensitively catalyze the reaction of H2 O2 oxidizing discoloration of methyl violet in buffer solution in the existence of Tween - 80. The kinetic optimum condition of the catalytic reaction was investigated and a new method for the determination of trace aluminum was proposed. The detection limit for aluminum（Ⅲ） in 2. 247 × 10^-10g · mL^-1. The linear range of determination is 0 -0. 8μg/25mL. Satisfactory results were obtained for the determination of trace aluminum （Ⅲ） in human hair, food samples and water samples.
出处
《化学工程师》
CAS
2008年第5期53-55,共3页
Chemical Engineer
关键词
铝
动力学光度法
胶束
aluminum
kinetic spectrophotometry
micelle
