离子选择电极法联合测定重铀酸盐中氟和氯

Determination of Fluorine and Chlorine in Diuranate by Direct Potentiometric Combined with Ion Selective Electrode

本文用离子选择性电极直接电位法对重铀酸盐样品中氟和氯的测定方法进行了研究。结果表明:氟电极活化所需时间为40分钟,选择测定时溶液pH值的范围为6～7,在测定过程中应保持样品温度与标准溶液的温度一致。本法用于重铀酸盐中氟、氯的测定取得了较满意的结果,样品加标回收率均在92%～104%之间。结果表明改进后的方法可用于重铀酸盐样品中氟、氯的测定。

In this paper, the ion selective electrode potentiometry was used for the determination of fluoride and chloride in diuranate. The results showed that the fluorine electrode activation time required for 40 minutes, the pH range of the measured solution was 6~7, the temperature of the sample should be kept consistent with the standard solution. It obtains the satisfaction by determined the diuranate, and the recoveries of standard addition 92 %~104 % respectively. It is declared the improved method can be used for diuranate samples in the determination of fluorine, chlorine.