密度-电导-温度法测量铀-酸体系中铀和硝酸

提出了密度-电导-温度法测量铀-酸溶液中铀和硝酸含量。建立铀-酸溶液的密度、电导率和铀质量浓度、硝酸浓度以及温度之间的数学模型,该模型为一非线性二元二次方程组。只要测出铀-酸溶液的温度、密度和电导率,代入上述方程组,即可由计算机计算出铀-酸体系中铀和硝酸浓度。结果表明:当铀-酸体系中铀质量浓度范围在50~200g/L、硝酸浓度范围在1~4mol/L时,该法对铀和硝酸浓度的测量相对误差均在±5%之间。

Determination of Uranium and Nitric Acid in Uranyl Nitrate System Based on Density-Conductivity-Temperature Method

A method for determination of uranium and nitric acid in uranyl nitrate system was established through combination measurement of density-conductivity-temperature. A mathematical model, which described the relationship between the concentration, temperature, density and conductivity, was obtained. This model was a set of non-linear dualistic quadratic equations. Once the temperature, density and conductivity of uranyl nitrate system were measured, the concentration of uranium and nitric acid could be calculated by computer. The method was used to determine the concentration of uranium and nitric acid in uranyl nitrate system. The results show that the relative errors are between ±5% to uranium and nitric acid.