Realization of Replacing Oil-base Standard Sample with Water-base Standard Sample in X-Ray Fluorescence Spectrometry
In the field of oil analysis by X-ray fluorescence spectrometry,a method was developed on basis of water-based standard sample instead of oil-based standard sample.Selecting the elements of vanadium,iron,nickel and manganese as the research objects,emulsification technology was applied to synthesize oil-water mixture in sample preparation and water-based standard sample and blank oil synthesized water-in-oil emulsion with emulsifier span80.The matrix effect was corrected by theoretical α influence coefficients or internal standard method.It was found that when the matrix composition of oil-base sample or water-base sample was known,the matrix effect was corrected by theoretical α influence coefficients,calibration samples of oil-base or water-base could be exchanged,and when the matrix composition was unknown,the matrix effect was corrected by internal standard method,but only synthesized oil-water mixture,calibration to be successful.Accuracy of the method was verified by comparison test of crude oil and fuel oil samples,the method was compared with the standard method,both test results were consistent.