【摘要】 作者用pH电位滴定法测定了Cu、Ni、Zn、Co二价金属离子在37±0.2℃,离子强度为0.15mol/L（KNO₃）条件下,分别与α-氨基乙酸及DL-α-氨基异戊酸所形成的二元及三元络合物的稳定常数,并对三元络合物体系中各物种的组成进行了计算。更多还原

【Abstract】 The stability constants of the Cu-Valine-Glycine system （1:1:1）, Ni-Glycine-Valinesystem （1:1:1） , Zn-Glycine-Valine system（1:1:1）, Co-Glycine-Valine system （1:1:1）and stability constants of binary complexeswere determined at Iu=0.15 mol/L （KNO₃）and t=37±0.2℃ by means of pH titrationmethod and the composition distribution ofthe ternary systems was calculated. The stability constants of binary andternary complexes were calculated byAdrien-Albert method and Liang Guoganga method respectively. The results showed that the ternarycomplexes were more stable than binarycomplexes. Either for the binary or forthe ternary eomplexes, the stability of thecomplexes decreased in sequence Cu（Ⅰ）Ni（Ⅰ）>Zn（Ⅰ）>Co（Ⅰ）.更多还原