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在胆汁酸盐背景中n种氨羧配位剂的加质子常数及其钙配合物稳定常数

The Protonation Constants of Some Aminopolycarboxylic Acids and the Stability Constants of Their Calcium Chelates in the Medium Containing Bile Acids

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【作者】 计季许善锦王夔

【Author】 Ji Ji Xu Shanjin and Wang Kui (Faculty of Pharmaceutical Sciences, Beijing Medical University, Beijing)

【机构】 北京医科大学药学院北京医科大学药学院

【摘要】 为测定在胆酸盐和脱氧胆酸盐存在下氨提配位剂的加质子常数和钙配合物稳定常数,对常规电住法做了一些修正。用所建立的方法测定了EDTA、DTPA、EGTA及NTA的有关常数及其随胆汁酸浓度的变化。

【Abstract】 For the determination of the protonation constants of aminocarboxylatc ligands and the stability constants of their calcium chelales in the presence of cholate and deoxycholate,some modifications were introduced into the traditional potcntiomet-ric method.Obviously,these constants,thus determined are in nature,conditional,because the bile acids are surfactants,acids as well as complexing agents.By means of these methods,the conespending constants for EDTA,DTPA,EGTA and NTA were determined as the function of the concentration of bile acids.The bile acids affect both the proton transfer t.nd coirpkxation prcccsscs,but the protonation constants change less than the stability constants.It is noted that the bile acids affect these constants in some concentrations lower than CMC.Thus their oligomer bind with cations(H+or Ca2+).

【基金】 中国科学院科学基金资助课题
  • 【文献出处】 高等学校化学学报 ,Chemical Research In Chinese Universities , 编辑部邮箱 ,1986年10期
  • 【被引频次】2
  • 【下载频次】65
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