作者: Georgina M. S. Alves , Júlia M. C. S. Magalhães , Helena M. V. M. Soares
关键词: Cobalt 、 Square wave 、 Cathodic stripping voltammetry 、 Electrode 、 Voltammetry 、 Detection limit 、 Chemistry 、 Bismuth 、 Analytical chemistry 、 Nickel 、 Inorganic chemistry 、 Electrochemistry
摘要: A simple, fast, sensitive and greener voltammetric procedure for simultaneous analysis of nickel (Ni) cobalt (Co) by square wave adsorptive cathodic stripping voltammetry (SW-AdCSV) using a solid bismuth vibrating electrode is presented the first time. The enables to determine Ni together with Co, in ammonia buffer 0.1 M (pH 9.2) presence oxygen, involves an accumulation metal-dimethylglyoxime (Ni-DMG Co-DMG) complexes on surface. For detection limits, obtained 30 s time, were 0.6 1.0 µg L−1, respectively. method was free metals (Cd2+, Cr3+, Cr6+, Cu2+, Fe3+ Pb2+ up 50 µg L−1, Al3+ Mn2+ 500 µg L−1; Zn2+ 300 µg L−1) interferences concentrations mentioned brackets. proposed validated determination Co certified reference surface river waters good results.