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在NaOH_(-1),2-环己烷二肟-NH_4Cl-NaNO_2体系中,钴镍均能产生灵敏的极谱催化波,在该体系中催化波的峰高与钴镍浓度成很好的线性关系,钴镍的最低检出极限分别为0.02和0.33ppb,对于1ppbCo和50ppb的Ni进行连续测定,其变更系数分别为±2.0％和±2.2％(n=10),本文详细地研究了形成Co、Ni催化波的条件,并初步探讨了机理,提出了可以同时测定痕量Co与Ni的分析方法。
In the NaOH _ (-1), 2-cyclohexanedioxime-NH_4Cl-NaNO_2 system, both cobalt and nickel can produce sensitive polarographic catalytic wave. In this system, the peak height of the catalytic wave is in good agreement with the cobalt-nickel concentration The minimum detectable limits for cobalt and nickel were 0.02 and 0.33 ppb, respectively, and the coefficients of variation were ± 2.0% and ± 2.2% (n = 10) for the continuous determination of 1 ppb Co and 50 ppb Ni, respectively. In this paper, The formation of Co, Ni catalytic wave conditions, and preliminary discussion of the mechanism, proposed the simultaneous determination of trace amounts of Co and Ni analysis.