示波极谱法测定Cu~(2+),通常在氨-氯化铵介质中进行。利用Cu~(2+)与某些络合剂生成的络合物在滴汞电极上的吸附富集作用,常可提高Cu~(2+)的灵敏度。我们曾研究了胱氨酸在Cu~(2+)-乙二胺和Cu~(2+)-氨基乙酸溶液中的示波极谱行为,发现在乙二胺或氨基乙酸缓冲液中,在一定量Cu~(2+)存在下,由于胱氨酸与Cu~(2+)的共存,可产生某些灵敏度较高的极谱吸附波,并用于测定微量胱氨酸。进一步试验发现,在同样的缓冲液中,在一定量胱氨酸存在下,微量Cu~(2+)也可产 Oscillopolarographic determination of Cu ~ (2+), usually in ammonia - ammonium chloride medium. The use of Cu ~ (2+) complex complex with some complexing agent in the mercury droplet adsorption enrichment, often can improve the sensitivity of Cu ~ (2+). We have studied the oscillopolarographic behavior of cystine in Cu ~ (2 +) - ethylenediamine and Cu ~ (2 +) - glycine solutions and found that in ethylenediamine or glycine buffer, Due to the coexistence of cystine and Cu 2+ in the presence of a certain amount of Cu 2+, some highly polar polarographic adsorption waves can be produced and used for the determination of trace cystine. Further experiments found that in the same buffer, in the presence of a certain amount of cystine, trace Cu ~ (2+) can also be produced