由特性粘数与凝胶渗透色谱(GPC)图谱计算各种平均分子量.pdfVIP

The Influence of Residual Silanol Groups of the 结 论 Stationary Phase Surface on the Retention Behavior of （一）反相体系中，当流动相在较低的缓冲液浓 Heteropoly Acids Wang Yanping and Zhu Mighua,Ana yss 度（3m mol·L-1）和pH值（pH 4下，键合相表 Research Centre,East China University of Chemical 面残留硅醇基对杂多酸阴离子有较强的相互作用。 Technology,Shanga,200237 在此条件下，溶质保留因子的倒数与缓冲液浓度具 In the reversed-phase system,the influence of 有下述关系： residual silanol groups of C18 bonded phase surface on the retention behaviors of heteropoly acid(HPA) anion is studied.It is shown that,when the pH value in the （二）残留硅醇基对杂多酸盐和有机胺类化合物 mobile phase is less than 4 and the concentration of 表现出具有相同的作用机制。 buffer (as mobile phase) is less than 3 mmol·L-1,the residual silanol groups exert retention action on HPA 参 考 文 献 anion.The less the pH value and the concentration of [] 曾前东、朱明华、徐延瓞，化学学报，45(1),96(1987). buffer,the stronger the retention action is.The [2]曾前东、朱明华、徐延瓞，化学学报，46(6),537 relationship between the reciprocal of the capacity factor (1988). of HPA anion and the concentration of buffer can be [3] A.D.Kirk et al.,Anal.Chem.,60,7971988). described as k-=A(Z-)m+B.At higher concentration [4] A.D.Kirk et al.,Inorg.Chem.,28,7921989). of buffer the influence of residual silanol groups on HPA [5] B.A.Bidlingmeyer et al.,Anal.Chem.,59,1843 anion retention is decreased because of the present of the