【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。更多还原

【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+).更多还原