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研究了在丁二酮肟碳糊化学修饰电极上测定人发中微量镍、钴的可行性,经化学富集Ni(Ⅱ)和电化学富集Co(Ⅱ),阴极溶出伏安法测定,Ni(Ⅱ)、Co(Ⅱ)在该电极上均有良好的响应,探讨了有关实验条件。该法对镍、钴的检测限分别可达1.0×10~(-9)mol/L和4.2×10~(-10)mol/L,应用于头发中微量镍,钴的测定,结果满意。
The feasibility of determination of trace amounts of nickel and cobalt in human hair by dimethylglyoxime carbon paste modified electrode was studied. The results of electrochemical enrichment of Ni (Ⅱ) and electrochemical enrichment of Co (Ⅱ) by cathodic stripping voltammetry, Ni (Ⅱ) and Co (Ⅱ) have good response on this electrode, and the relevant experimental conditions are discussed. The detection limits of nickel and cobalt are 1.0 × 10 ~ (-9) mol / L and 4.2 × 10 ~ (-10) mol / L respectively. The method is applied to the determination of trace nickel and cobalt in hair with satisfactory results.