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介绍用TBP——苯溶液萃取光度测定Tecl_5~-与丁基罗丹明B终合物的如下结果: (1)盐酸浓度为4——6N,丁基罗丹明B(0.5％)4——6mI以试剂空白为参比在540nm处测量有机层的吸收。 (2)络合物克分子吸光系数为6.4×10~4,离子对络合物组成为Tecl_5~-.R~+。 (3)萃取反应为: Te~(4+)+H~++Cl_5~-?MHTeCl_5 TeCl_5~-+R+?[TeCl_5~-.R~+]萃取平衡常数为1×10~5. (4)研究了干扰离子的影响及其允许量;该方法已成功地用于二氧化硒中碲的分 离和测定。
Introduction TBP-- benzene solution extraction photometric determination of Tecl_5 ~ - and butyl rhodamine B final product of the following results: (1) hydrochloric acid concentration of 4 - 6N, butyl rhodamine B (0.5%) 4 - 6mI The organic layer was measured for absorbance at 540 nm using the reagent blank as a reference. (2) The molar extinction coefficient of the complex is 6.4 × 10 ~ 4, and the ion pair complex is composed of Tecl_5 ~ -.R ~ +. (3) The extraction reaction is: Extraction equilibrium constant of Te ~ (4 +) + H ~ ++ Cl_5 ~ -? MHTeCl_5 TeCl_5 ~ + R +? [TeCl_5 ~ -.R ~ +] is 1 × 10 ~ ) Studied the effects of interfering ions and their allowances; this method has been successfully used for the separation and determination of tellurium in selenium dioxide.