钼(Ⅵ)-2-(5-溴-2-吡啶偶氮)-5-二乙氨基苯酚-溴酸钾体系的催化吸附波  

Catalytic Adsorptive Wave of Molybdenum(Ⅵ)-2-(5-Bromo-2-Pyridylazo)-5-Diethylamino Phenol-Potassium Bromate System

作　　者：邓保炜[1] 杜芳艳[2] 刘慧瑾[2] 张亚[2] 陈飞飞[2] 

机构地区：[1]榆林学院能源化工研究中心,陕西省榆林市西沙崇文路2号719000 [2]榆林学院化学与化工学院,陕西省榆林市西沙崇文路2号719000

出　　处：《光谱实验室》2011年第5期2468-2472,共5页Chinese Journal of Spectroscopy Laboratory

基　　金：陕西省教育厅科学研究项目(2010JK925);陕西省科技厅项目(2010JM2017);榆林市科技局资助项目(Gg09-2-05);榆林学院资助项目(10GK02)

摘　　要：在0.046mol/L HAc-NaAc(pH4.84)支持电解质中,Mo()-2-(5-溴-2-吡啶偶氮-5-二乙氨基苯酚-溴酸钾)[Mo()-5-Br-PADAP-KBrO3]络合物于-0.72V(vs.SCE)左右产生一个灵敏的络合吸附波,该波的二阶导数峰峰电流与1.5×10-8—2.0×10-5mol/L范围内的钼呈线性关系(r2=0.9988,n=10)。检出限为5.0×10-9mol/L。方法回收率在93.1%—101.3%之间。经多种电化学方法证明该波为催化吸附波,其电极过程为不可逆过程。电子转移数和质子转移数均为2。此外还试验了多种离子对峰电流Ip″的影响。方法适用于污水中微量Mo()的测定。In the concentration HAc-NaAc of 0.046mol/L（pH4.84）,Mo（Ⅵ）-5-Br-PADAP-KBrO3 complex caused a sensitive adsorptive complex wave at the potential of-0.72V（vs.SCE） around.The 2nd-order derivative peak current was linear with molybdenum（Ⅵ） concentration in the range of 1.5×10-8—2.0×10-5mol/L（r2=0.9988,n=10）with detection limitation of 5.0×10-9mol/L.The recovery was between 93.1%—101.3%.Several electrochemical methods were used to study the properties of catalytic adsorptive wave.The electrode process is an irreversible reduced one,and the number of electron transfer and proton transfer number both were 2.The interferences of diverse ions on the peak current were investigated.The proposed method is applied to determine trace molybdenum in sewage.

关 键 词：催化吸附波 2-(5-溴-2-吡啶偶氮)-5-二乙氨基苯酚 溴酸钾 钼 

分 类 号：O657.14[理学—分析化学]