| | | | | 稀土氨基酸在混合溶剂中的配位常数测定及热力学常数计算 | | | 谭钦德，梁小平，岑学忠，潘毅聪 | | | 用ｐＨ法测定了镧和天门冬氨酸在水—二甲基亚砜、钕和甘氨酸在水—二氧六环混合溶剂中的配位常数．测定精度为±０．０１ｐＨ单位．通过加入一定量硝酸钾溶液维持溶液的离子强度（０．１０ｍｏｌ／Ｌ）．测定时采用氮气氛保护并保持温度变化不超过±０．２Ｋ．利用配位常数计算了这些配合物在混合溶液中的△Ｇ°、△Ｈ°和△Ｓ°．
【作者单位】：佛山大学科教发展处
【关键词】：稀土氨基酸配合物，稳定常数，热力学常数
【分类号】：TS201.24
【DOI】：cnki:ISSN:1008018X.0.1994-06-005
【正文快照】：
稀土氨基酸在混合溶剂中的配位常数测定及热力学常数计算谭钦德，梁小平，岑学忠，潘毅聪摘要用ｐＨ法测定了镧和天门冬氨酸在水—二甲基亚砜、钕和甘氨酸在水—二氧六环混合溶剂中的配位常数．测定精度为±０．０１ｐＨ单位．通过加入一定量硝酸钾溶液维持溶液的离子强度（０．１０ｍｏｌ／Ｌ）．测定时采用氮气氛保护并保持温度变化不超过±０．２Ｋ．利用配位常数计算了这些配合物在混合溶液中的△Ｇ°、△Ｈ°和△Ｓ°．关键词稀土氨基酸配合物；稳定常数；热力学常数中图分类号ＴＱＯ１５稀土元素与氨基酸在具有不同介电常数介质中的配… | | |  推荐 CAJ下载  PDF下载 | | | CAJViewer7.0阅读器支持所有CNKI文件格式，AdobeReader仅支持PDF格式 | | | | The Determination of Coordination Constants of Rare Earth Amino-Acid in the Mixed Solvent Systems and the Computation of Thermodynamical Parameters | | | Tan Qinde; Ling Xiaoping; Cen Xuezhong; Pan Yicong(Development Department of Teaching & Scientific Researches;Foshan University;Foshan 528000) | | | The paper, by PH titration technique, measured the coordination constants of Nd-Gly in waLer-1, 4-dioxane solvent and of La-Asp in water-dimethyl sulfoxide solvent.The pH vaines was accurately measured with a sensitivity of ±0. 01. An ionic strength of 0.10 (mol/L ) was maintained by adding a calculated amont of potassium nitrate solution (1mol/L). The titrations were carried out in a nitrogen atmosphere and at a temperature range of to±0.2k. The △G°, △H° and △S° of the complexes in these solvents were also calculated out by the coordination constants.
【Keyword】：rare earth amino -acid complex;stability constant;thermodynamical parameter |
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