催化动力学荧光法测定痕量铝  

Catalytic Kinetic Fluorimetric Determination of Trace Aluminum(Ⅲ)

作　　者：谭云[1] 葛慎光[1] 李波[1] 程晓亮[1] 丁玉龙[1] 于京华[1] 

机构地区：[1]济南大学化学化工学院,济南250022

出　　处：《分析科学学报》2007年第5期532-534,共3页Journal of Analytical Science

基　　金：山东省自然科学基金(No.Y2003B01)

摘　　要：研究了新型荧光试剂3-（4’-碘基苯基）-5-（2’-羧基苯偶氮）若丹宁的荧光性能。实验发现，在pH5．2的邻苯二甲酸氢钾氢氧化钠缓冲溶液中，痕量铝（Ⅲ）对H2O2氧化3-（4’碘基苯基）-5-（2’-羧基苯偶氮）若丹宁具有强烈的催化作用，据此建立了催化动力学荧光法测定痕量铝（Ⅲ）的新方法。本法检出限为6．46×10^-9g·mL^-1,线性范围为0～0．015μg·mL^-1方法用于发酵粉和沸水中铝含量的测定，结果满意。The fluorescence performance of a new fluorescent reagent, 3-（ 4＇-iodinylphenyl ）-5-（ 2＇- carboxylphenylazo） rhodanine, has been studied. A catalytic kinetic method was described for the determination of trace amount of aluminum （ Ⅲ ）, based on its catalytic effect on the oxidation of 3-（4＇- iodinylphenyl）-5-（2＇-carboxylphenylazo） rhodanine by hydrogen peroxide under the buffer medium of potassium hydrogen phthalate- sodium hydroxide. The linear range of this method was from 0 to 0. 015 μg.mL^-1 and the detection limit was 6.46×10^-9 g.mL^-1. The method was applied to the determination of trace aluminum in baking powder and boiling water with satisfactory results.

关 键 词：催化动力学荧光分析法 3-(4’-碘基苯基)-5-(2’-羧基苯偶氮)若丹宁 铝(Ⅲ) 

分 类 号：O657.39[理学—分析化学]