Determination of Stability Constants of Cadmium-Glycine Complexes by a Unified Treatment for Potentiometric and Polarographic Data  

电位法和极谱法联合确定镉-甘胺酸络合物稳定常数(英文)

作　　者：张建民[1] 石秋芝[1] 

机构地区：[1]郑州大学化学系,郑州450052

出　　处：《Chinese Journal of Chemical Physics》2006年第2期164-168,共5页化学物理学报（英文）

摘　　要：The cadmium（Ⅱ）-glycine system was studied by the two experimental techniques, ion sensitive electrode （ISE） and differential pulse polarography （DPP）, and the experimental data obtained were used by a unified mathematical treatment to calculate the complex stability constants. The combination of the two techniques is of many advantages as ISE can be performed at low [LT]：[MT] ratios and significantly higher [MT], whereas DPP could be used well at large [LT]：[MT] ratios and much smaller [MT]. This makes it possible to study a metal-ligand system in a relatively broader range of experimental conditions that, in turn, provides more information about the metakligand system of interest. Applying the unified mathematical treatment to the cadmium-glycine system, two new complexes MHL and ML2（OH） as well as three complexes ML, ML2 and ML3, reported in literatures, could be modeled and all their stability constants have been refined.

关 键 词：Metal complex POLAROGRAPHY POTENTIOMETRY Stability constant 

分 类 号：O641.4[理学—物理化学] O614.532[理学—化学]