红外吸收法与热导法同时测定铀硅化合物中氧、氮含量

Simultaneous Determination of Oxygen and Nitrogen in Uranium-Silicon Compound by Infrared Absorption Method and Thermal Conductivity Method

采用氧/氮分析仪对铀硅化合物中氧、氮含量的测定方法进行了研究,以红外吸收法和热导法测定了铀硅化合物中氧、氮的含量。考察了取样量、助熔剂、加热功率、分析时间等参数对氧、氮含量测定的影响,并优化了相关的工作参数。当取样量为0.10 g(准确至0.0001 g)时,在以镍篮为助熔剂、4200 W的加热功率条件下,氧的质量分数测定范围为0.00050%~0.365%,氮的质量分数测定范围为0.00050%~0.026%,线性相关系数均大于0.999,测定相对标准偏差均优于10%。

The determination methods for oxygen and nitrogen in uranium-silicon compound were studied by oxygen/nitrogen analyzer. The contents of oxygen and nitrogen in uranium-silicon compounds were determined by infrared absorption method and thermal conductivity method, respectively. The effects of sampling amount, flux, heating power and analysis time on the determination of oxygen and nitrogen were investigated, and the related working parameters were optimized. When the sample dose is 0.10 g(accurate to 0.0001 g), under the condition of using nickel basket as the flux additive and 4200 W heating power, the determination range of oxygen is 0.00050%-0.365%, and the determination range of nitrogen is 0.00050%-0.026%. The linear correlation coefficients are greater than 0.999, and the relative standard deviations are better than 10%.