摘要
His、Gly-His、Ala-His、Gly-Gly和Gly-Gly-Gly与锌、镉的配合物的稳定常数已有报道,由于不同作者的实验方法和数据处理方法不同,测定结果也不尽一致.有些数据是用手算方法进行数据处理的,求得的稳定常数可能不够精确.本工作采用文献推荐的微量pH电位滴定技术,对上述配体与Zn(Ⅱ)、Cd(Ⅱ)配合物稳定常数进行了测定.
A potentiometric study on the complexes of His, Gly-His, Ala-His, Gly-Gly and Gly-Gly-Gly with Zn( Ⅱ ), Cd( Ⅱ ) is reported and small scale (piston buretle or microsyrine) potentiometric titrations were carried out to determine the stability constants of complexes at 25 ℃ and I = 0. 10 mol/L (KNO3) conditions. The data treatment were performed with the computer program TITRE and SUPERQUAD on a BBC micro-computer. The stisfactory results has been obtained by using this method.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1992年第3期322-324,共3页
Chemical Journal of Chinese Universities
关键词
锌
镉
配合物
稳定常数
氨基酸
肽
Zinc( Ⅱ ), Cadmium( Ⅱ ), Amino-acid, Dipeptide, Tripeptide, Micro-pH-potentio-metric titration
