Determination of stainless steel by mosaic sample preparation combined with standardless X-ray fluorescence spectrometry
AN Xiaojiao1, MA Xian1, LIU Tao1,2, WANG Jun1
1. Institute of Physical and Chemical Engineering of Nuclear Industry,Tianjin 300180,China; 2. Science and Technology on Particle Transport and Separation Labortory,Tianjin 300180,China
Abstract：Sample preparation is the first and key step for analysis and testing by X-ray fluorescence spectrometry(XRF). The success of sample preparation or not directly affects the accuracy of measurement results. Stainless steel was selected as an example in the study. For the sample with size that did not meet the requirements for direct XRF testing, the mosaic sample preparation was employed. The elements including Fe, Cr, Mn, Ni, Cu, Si, Co, V and Mo in stainless steel were quantitatively analyzed by standardless XRF. The influence of sample size on the testing results was studied by the mosaic method. It was found that for the main targets of major and minor components including Fe, Cr, Ni and Mn, when more than 25% of spot area was covered by the sample, the relative errors of testing elements were commonly less than 1.5%, and the relative errors of microelements (except for Si) were within 5.2%, which could meet the testing requirements. Through quantitative standardless analysis of standard sample of stainless steel, it was found that the major and minor elements of Fe, Cr and Ni in stainless steel could be accurately determined by the proposed method. The relative errors were not more than 1.6%. The relative errors of Si and Cu in microelements were within 5.0%. The actual samples were quantitatively determined by mosaic method without standards. Through the comparison with chemical method, it was further confirmed that the non-standard size stainless steel samples could be rapidly measured by XRF. The quantitative analysis method of mosaic sample preparation combined with X-ray fluorescence spectrometry without standards could be also extended to other alloy products.
安晓娇, 马贤, 刘涛, 王筠. X射线荧光光谱镶嵌制样无标测定不锈钢[J]. 冶金分析, 2022, 42(2): 15-20.
AN Xiaojiao, MA Xian, LIU Tao, WANG Jun. Determination of stainless steel by mosaic sample preparation combined with standardless X-ray fluorescence spectrometry. , 2022, 42(2): 15-20.
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