增效试剂在动力学分析法中的应用研究（Ⅰ）──锰（Ⅱ）－高碘酸钾－氨三乙酸－PAN－TritonX－100催化体系  

A Study of Enhancing Agent in Kinetic Analytical Method(Ⅰ)──A New Mn(Ⅱ)-Potassium Periodate-Nitrilo Triacetic acid-1-(2-pyridylazo)-2-naphthol-Triton X-100 Catalytic Spectrophotometric System

作　　者：郑肇生[1] 景卫国[1] 

机构地区：[1]福州大学化学系

出　　处：《高等学校化学学报》1995年第12期1861-1864,共4页Chemical Journal of Chinese Universities

基　　金：福建省自然科学基金

摘　　要：报道了以ＴｒｉｔｏｎＸ－１００为增溶剂，高碘酸钾氧化ＰＡＮ催化光度法测定痕量锰的新体系．方法的检出限为３．６×１０（－３）μｇ／ｍＬ，精密度为２．４％（ｎ＝９），线性范围为０．１０～１．３μｇ／２５ｍＬ，可用于谷物样品中锰的测定．The indicator reactions for using in kinetic spectrophotometry are necessarily those reactions of homogeneous system.If the reactants or the products are insoluble,these reactions can not be monitored by spectrophotometry.The authors change non-homogeneous systems into analog-homogeneous systems extending the range of selecting indicator reactions of kinetic spectrophotometry by adding surfactant to insoluble reactions with the solubilizing effect of surfactant.A new catalytic spectrophotometric system for the determination of trace of Mn(Ⅱ)has been developed.This method is based on the catalytic oxidation of 1-2-pyridylazo)-2-naphthol by potassium periodate in the presence of Triton X-100 as a solubilized agent.The detection limit is 3.6×10￣(-3)μg/mL,the relative standard deviation is 2.4%,the linear range of determination is 0.1～1.3 μg/25 mL for Mn(Ⅱ). This method has been successfully used to determine Mn in cereal samples.

关 键 词：光度法 吡啶偶氮 萘酚 锰 谷扬 

分 类 号：O614.711[理学—无机化学] O657.32[理学—化学]