Determination of Uranium in Imported Uranium Trioxide by Wavelength Dispersive X-ray Fluorescence Spectrometry
In order to meet the accuracy and timeliness requirements of natural uranium trade reinspection,the working conditions for determining uranium in imported uranium trioxide by wavelength scattering X-ray fluorescence spectroscopy were optimized.Suitable digestion methods,digestion vessels,digestion time and temperature,mylar film,sample quality for determination,and other sample pre-treatment conditions were selected for optimization.The measuring conditions of X-ray tube voltage and current,spectroscopic crystal,wave crest and background angle(2θ),measure the time were determined.The precision,accuracy and reliability of the method were evaluated.The results show that the linear correlation coefficient of the working curve of the method is 0.999 6,and the relative standard deviation(RSD)is 0.029％～0.056％.The relative error between the measurement results and the recommended value of the reference material is ≤0.027％.Compared with the titration method,the absolute deviation of the method is 0.003％～0.093％,the results are accurate and reliable,and The efficiency is 5 times that of titration.The method can meet the requirements for rapid batch analysis of imported uranium trioxide samples.
万方数据
维普
