Research On The Application Of X-Ray Fluorescence Spectrometry In Fuel Oil Analysis

The direct measurement method of Al,Si,V,S in fuel oil by X-ray fluorescence spectrometer was studied in this thesis . X-ray fluorescence spectrometry was successfully applied in multi-elements analysis of fuel oil, and the elements losing during ashing of the fuel oil was avoided. The problems from the traditional analysis method ,such as complicated operation method, long analysis time ,and not enough accurate results, were solved . The application field of X-ray fluorescence spectrometry in China was enlarged , a new rapid elements analysis method of fuel oil was introduced.Some special problems of measuring of fuel oil by X-ray fluorescence spectrometry ,such as the influence of liquid cup foil and selection basis of the foils, preparation method and stabilization of the oil standard samples , the matrix effects and correction method , were tested carefully and researched deeply. 5 types of liquid cup foil were used to test the influence of fuel oil analyzed by X-ray fluorescence spectrometry , the foil should be selected in accordance with the kind of oil and the analysis requirement . 2 methods to stable the oil standard samples were advanced: long time stabilization of the oil standard samples was improved by adding stabilization reagent, short term stabilization of the oil standard samples was improved by increasing the viscosity of the solvent. Internal standard and variable theoretical a influence coefficents were used to correct the matrix effects .The matrix effects in samples which the change of elements content are large can be corrected by internal standard ,and the matrix effects in samples which the composition of the matrix is known can be corrected by variable theoretical a influence coefficients.The analysis results show that, this method is simple, rapid, the accuracy and precision of this method are acceptable, and the analysis results are comparable to those obtained by wet chemical method.