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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.
The stability constants of complexes of His, Gly-His, Ala-His, Gly-Gly and Gly-Gly-Gly with zinc and cadmium have been reported. Due to the different experimental methods and data processing methods of different authors, Some data are calculated by hand method, and the obtained stable constants may not be accurate enough.In this work, we use the micro-pH potentiometric titration recommended by the literature to synthesize these ligands with Zn (Ⅱ) and Cd (Ⅱ) Material stability constants were determined.