Abstract： Cobalt Ⅱ had a sensitive polarographic wave in hexamethylene tetramine-2-(5-iodo-2-pyridine azo)-5-dimethylaminoaniline-NH2OH·HCl system. The peak potential VP was –1.22 V (vs. SCE). The peak current IP’ showed a good linear relationship to the mass concentration of cobalt Ⅱ in the range of 3-40 μg/L. The detection limit of method was 0.47 μg/L. The polarographic wave properties of this system were studied. The results showed that this wave was complex adsorption wave. The electrode process was irreversible and the electron transfer number was 2. The proposed method was applied to the determination of trace cobalt in nickel ore sample. The relative standard deviation of determination results was 1.8 % and the recovery of standard addition was 110 %.
霍燕燕，韩 权，杨晓慧. 钴Ⅱ与2-(5-碘-2-吡啶偶氮)-5-二甲氨基苯胺络合物极谱吸附波的研究及其应用[J]. 冶金分析, 2013, 33(2): 18-21.
HUO Yan-yan，HAN Quan，YANG Xiao-hui. Study on the polarographic adsorption wave of complex formed by cobalt Ⅱ and 2-(5-iodo-2-pyridine azo)-5-dimethylaminoaniline and its application. , 2013, 33(2): 18-21.
［3］ Baghban N, Shabani A M H, Dad farnia S, et al. Flame atomic absorption spectrometric determination of trace amounts of cobalt after cloud point extraction as 2-［(2-Mercaptophenylimino)methyl］ phenol complex［J］. Journal of the Brazilian Chemical Society, 2009, 20(5) : 832-838.
