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随着电子计算机应用技术的推广,X射线荧光光谱分析的应用范围不断扩大.仪器已高度自动化.X 射线荧光光谱分析方法已定为国际标准(ISO)分析方法之一,准确度优于发射光谱和原子吸收光谱,但检出限和分析元素的范围不如发射光谱和原子吸收光谱.现用的一般仪器只能分析周期表中原子序数11(Na)—92(U)的元素,含量只能分析 ppm 级以上的浓度.为了克服这些缺点,近几年来加强了扩大分析范围的研究,一是如何降低检出限,二是如何测定周期表中原子序数低于11(Na)的超轻元素.
With the popularization of the application of computer technology, the application of X-ray fluorescence spectrometry has been expanded and the instrument has been highly automated. X-ray fluorescence spectrometry has been established as one of the international standard (ISO) analytical methods with accuracy better than the emission spectrum And atomic absorption spectroscopy, but the detection limit and analysis of the range of elements is not as good as the emission spectrum and atomic absorption spectrometry. The existing general instruments can only analyze the periodic table atomic number 11 (Na) -92 (U) elements, content only In order to overcome these shortcomings, studies to expand the scope of the analysis have been stepped up in recent years. One is how to reduce the detection limit and the other is how to determine the ultra-light elements with atomic numbers below 11 (Na) in the periodic table .