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本文研究了一种用Ｎａｆｉｏｎ修饰玻碳电极阴极溶出伏安法测定痕量钴的新方法．有效地避免了镍对钴的干扰．在ｐＨ＝２．０的０．０１ｍｏｌ／ＬＮａＮＯ_３底液中，于＋１．０伏下（ＶＳ．Ａｇ－ＡｇＣｌ）Ｃｏ~（２＋）被氧化成Ｃｏ~（３＋）而被交换富集，然后以１００ｍｖ／ｓ的扫描速度扫描溶出，于＋０．３５伏处得到钻的灵敏溶出峰．峰电流与钴浓度在２０－６００ｎｇ／ｍｌ范围呈良好线性关系．该法用于合成氨球形催化剂和Ｂ＿（１２）注射液中钴的测定，结果可靠，回收率在９０－１１０％之间．
In this paper, a new method for the determination of trace cobalt by cathodic stripping voltammetry with Nafion modified glassy carbon electrode was studied. Effectively avoiding the interference of nickel with cobalt. Co (2+) was oxidized to Co ~ (3+) at +1.0 volts (pH.Ag-AgCl) and exchanged for enrichment in a 0.01 mol / L NaNO 3 solution at pH 2.0. A scanning sweep at 100 mv / s was performed to elute and a sensitive diamond dissolution peak was obtained at +0.35 volts. Peak current and cobalt concentration in the range of 20-600ng / ml showed a good linear relationship. The method was applied to the determination of cobalt in synthetic ammonia spherical catalyst and B_ (12) injection with reliable results and the recovery was between 90 and 110%.