铀-二甲苯胺蓝Ⅰ络合物研究

铀-二甲苯胺蓝Ⅰ络合物研究 STUDIES ON URANIUM-XYLIDINE BLUE I COMPLEX 蔡晓华 Cai Xiaohua and Zhao Zaofan first-author 赵藻藩 在氨性介质中,二甲苯胺蓝Ⅰ与铀形成稳定的络合物。用光度法和极谱法测定了二甲苯胺蓝Ⅰ的酚羟基（pka2）和萘羟基（pkas）离解常数,pka2=7.72,pka3=12.73（光度法）;pka3=12.50（极谱法）。并测定了二甲苯胺蓝Ⅰ和铀的络合物组成和表观稳定常数,其结果为:U∶XBI=1∶2,logβ′=9.09（极谱法）,8.81（光度法）。 In this paper, by using spectrophotometry and polarography, we have studied uranium-xylidine blue I（XBI） complex in ethylenediamine buffer solution. The dissociation constants of hydroxyl group of XBI have been determined. The result shows pk a2 =7.72（phenol）, pk a3 =12.73（naphthol, by spectrophotometry）; pk a3 =12.50（by polarography）. The composition and formation constant of uranium-XBI complex have also been determined. U: XBI=1: 2, log β′=9.09（by polarography）, 8.81（by spectrophotometry）. 显色剂 二甲苯胺蓝Ⅰ 铀络合物 光度法 极谱法 developing agent xylidine blne I uranium complex spectrophotometry polarography 中国科学院科学基金 1987-02-01 2021-04-01 2