电位滴定法测定铀溶液中的游离酸  

Determination of Free Acid in UO_2^(2+) Solution by Using Potentiometric Titrition Method

作　　者：岳廷盛[1] 

机构地区：[1]兰州大学现代物理系,兰州730000

出　　处：《兰州大学学报（自然科学版）》1993年第3期131-134,共4页Journal of Lanzhou University(Natural Sciences)

摘　　要：在铀酰溶液中直接加入F^-、C_2O_4^(2-)离子,在DMF的非水介质中,UO_2^(2+)与F^-、C_2O_4^(2-)形成稳定的[UO_2(C_2O_4)·F_3·H_2O]^(3-)复合络合物,有效的掩蔽了UO_2^(2+)离子,以免UO_2^(2+)的水解。借助于电位滴定法,用Na_2B_4O_7溶液快速而准确的滴定出铀酰溶液中的游离酸浓度。By directly adding F^- ion,C_2O_4^(2-)ion and DMF solution into UO_2^(2+)solution, the stable complex of UO_2^(2+)with F^-and C_2O_4^(2+),[UO_2(C_2O_4,)F_3·H_2O]^(3-), was formed. Thus, UO_2^(2+)was screened effectively and its hydrolysis was avoided. By using the potentiometric titration method,the concentration of free acid in UO_2^(2+)solution can be titrated quickly and exactly by means of Na_2B_4O_7solution.

关 键 词：游离酸 络合物 铀溶液 电位测定法 

分 类 号：O614.62[理学—无机化学]