【摘要】 本文研究了Se催化过氧化氢氧化甲基橙反应体系测定痕量Se的方法。硒浓度在0～65.7μg/L范围内与褪色反应率lg(A0/A)呈线性关系。方法检出限为0.761μg/L。用于茶叶中硒的测定,结果较满意。更多还原

【Abstract】 Trace Se(IV) can catalyze the discolouring oxidizing reaction of methyl- orange with hydrogen peroxide in nitric acid medium. Based on this fact, new method of catalytic kinetic spectrophotometry for the determination of trace Se(IV) was established. The range of measurement was 0～65.7 μg/L. The sensitivity of the method was 0.761 μg/L. The method has been used to determine trace Se (IV) in tea with satisfactory results.更多还原