【摘要】 研究了在氨-氯化铵介质中Ce(Ⅳ)催化高碘酸钾氧化曙红Y的褪色反应及其动力学条件,测定了反应级数和表观活化能,建立了测定痕量铈的新方法。曙红Y的最大吸收波长为515 nm,该方法的检出极限为2.0×10-10g.ml-1,线性范围为0~400 ng.ml-1,可用于发样中痕量铈的测定。更多还原

【Abstract】 The decolouring oxidation of bromeosin Y by potassium periodate in ammonia-ammonia chloride medium using cerium（Ⅳ） as the catalyst was investigated in this paper.The reaction order and the apparent activation energy were determined.A new method for the determination of Ce was set up.The limit of detection is 2.0×10^-10 g·ml^-1 for Ce（Ⅳ） and the linear range is 0～400 ng·ml^-1 for Ce（Ⅳ）.The method is used to determine trace Ce in hairs with the satisfied results.更多还原