微波消解-阻抑动力学光度法测定面食品中的微量铝  

Determination of Trace Aluminum in Flour Products by Microwave Digestion-Inhibition Kinetic Spectrophotometry

作　　者：柴红梅[1] 张美丽[1] 高楼军[1] 张竹莲[1] 冯彩霞 

机构地区：[1]延安大学化学与化工学院,陕西延安716000 [2]米脂中学,陕西榆林718100

出　　处：《江西师范大学学报（自然科学版）》2009年第3期282-284,共3页Journal of Jiangxi Normal University(Natural Science Edition)

基　　金：延安市2008年科技计划(2008ks-15);延安大学创新(D2008-61)资助项目

摘　　要：利用微波消解法前处理样品，在pH=11．39的NH3-NH4Cl缓冲溶液中，在阳离子表面活性剂TPB的存在下，Al^3＋对KlO4氧化甲酚紫（m—CP）的褪色反应具有强烈的阻抑作用，据此建立了阻抑动力学光度法测定痕量Al^3＋的新方法．本方法的线性范围为1～8μg／25mL，检出限为2．32×10^-3μg／mL，回收率为99．2％～100．8％，可用于测定面食品中的微量Al^3＋，结果令人满意．Flour products are digested in the sealed container by the microwave digestion system. A simple and sensitive inhibition kinetic spetrophotometrie method for determination of trace aluminum has been developed in NH3-NH4Cl（ pH = 9.50） buffer solution. The method is based on the inhibiting effect of aluminum on the oxidation of m-CP by KIO4. Various surfactants have been studied as enhancing agents in the system. It was found that the 2.32 × 10^-3 μg/mL and values of recovery in the range of 99.2% - 100.8%. This method has been successfully used to the determination of aluminum in sample.

关 键 词：微波消解 阻抑 动力学光度法 铝 间甲酚紫 

分 类 号：O657.32[理学—分析化学]