近年来介绍痕量钴的极谱分析方法较多。如在氨性介质中加入半胱氨酸作底液测定,使钴与二硫代氨基甲酸盐形成络合物,用催化极谱法测定0.005微克/毫升钴。在NaOH—α.α联吡啶—硫酸羟胺体系中测定钴也有很高的灵敏度。此外,多数都是在有丁二酮肟存在的情况下,附加其它试剂组成的溶液,用催化极谱法测定钴,我们在掌握有关资料的基础上,结合具体情况,拟定了丁二酮肟—NH_4AC In recent years, the introduction of trace cobalt polarographic analysis more. For example, cysteine ​​is added to the ammoniacal medium for the determination of the base fluid to form a complex of cobalt with dithiocarbamate, and 0.005 μg / ml cobalt is determined by catalytic polarography. Cobalt also has high sensitivity in the NaOH-α.α bipyridyl-hydroxylamine sulfate system. In addition, most of them are solutions of other reagents added in the presence of dimethylglyoxime, and cobalt is determined by catalytic polarography. On the basis of the relevant information and in consideration of the specific circumstances, a dimethylglyoxime -NH_4AC