Research on the determination of coal ash by energy dispersive X-ray fluorescence spectrometry method
The determination of coal ash composition using energy-dispersive X-ray fluorescence spectrometry(EDXRF)is compared with the chemical analysis method,which requires relatively simple equipment and can obtain results quickly,with simpler operation and greater economic efficiency.This paper introduces the method of determi-ning multiple ash components in Guoneng Shenyou coal ash using EDXRF.The experimental conditions such as the preparation process of the ash sample,matrix effect,and energy spectrum mode are discussed.The method is veri-fied by multiple coal ash standard samples.It is pointed out that the preparation process of the ash sample should be carried out by grinding through a 0.1mm standard sieve and calcining at(815±10)℃ for1 hour.The matrix effect is removed by multiple linear regression to eliminate the interference between silicon and aluminum,phosphorus and calcium,potassium and calcium,and iron,titanium,and calcium in the ash components.The energy spectrum mode of 80 kcps-480 s can be detected through multiple coal ash standard samples,and the results are within the range of uncertainty requirements compared to the recognized values.The data is accurate and can meet the current laboratory's requirements for rapid determination of coal ash components.
energy dispersiveX-ray Fluorescence Spectrometrycoal ashmatrix effectspectral modemulti-variate linear regression
万方数据
维普
