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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。
Mo () 2- (5-bromo-2-pyridylazo-5-diethylaminophenol-potassium bromate) [Mo Br-PADAP-KBrO3] complex at -0.72V (vs.SCE) produces a sensitive complex adsorption wave, the wave second derivative peak current and 1.5 × 10-8-2.0 × 10-5mol / L in the range of molybdenum was linear (r2 = 0.9988, n = 10). The detection limit was 5.0 × 10-9mol / L. The recovery rate was between 93.1% and 101.3%. A variety of electrochemical methods to prove that the wave is a catalytic adsorption wave, the electrode process is irreversible process. Electron transfer number and proton transfer number are two. In addition, the effects of various ions on the peak current Ip "were also tested.The method is suitable for the determination of trace Mo (superscript +) in sewage.