镍-酸性铬兰K络合物吸附波  

ON THE ADSORPTIVE REDUCTION WAVE OF NICKEL(Ⅱ)-ACID CHROMIUM BLUE K COMPLEX

作　　者：杜姗[1] 倪永年[1] 

机构地区：[1]南昌大学化学系,江西南昌330047

出　　处：《南昌大学学报（理科版）》2004年第1期80-83,共4页Journal of Nanchang University(Natural Science)

基　　金：国家自然科学基金资助项目(20065001和20365002);江西省自然科学基金资助项目(0320014)

摘　　要：用微分脉冲溶出伏安法研究了镍(II)与酸性铬兰K(ACBK)所生成的络合物在悬汞电极上的电化学特性及电化学反应机理,发现电极反应为镍与酸性铬兰K所生成的络合物吸附在电极表面后发生的不可逆还原。在HCl-硼砂介质中(pH8.67),络合物在-316mV处有一吸附还原峰,其峰电流与镍浓度在0.001～0.010μg/mL范围内呈现良好的线性关系,其最低检出浓度为0.0005μg/mL。The electrochemical character and the mechanism of the complex of Ni(II)-ACBK at the hanging mercury drop electrode (HMDE) have been studied by the differential pulse stripping voltammetry. The irreversible reduction of the wave has been proved by the experiments. The composition of Ni-ACBK complex was found to be 1:2. The complex of Ni(II)-ACBK has a sensitive adsorptive reduction wave at -316 mv (vs.SCE) in the presence of pH 8.67 HCl-Boracic buffer. The linear relationship is observed between the peak current and the concentration in the range of 0.001-0.010 μg/mL for Ni and its detection limit is 0.000 5 μg/mL.-

关 键 词：微分脉冲溶出伏安法 络合物吸附波 电化学反应机理 镍-酸性铬兰 不可逆还原 电极 

分 类 号：O614.813[理学—无机化学] O647.3[理学—化学]