CORRECTION METHOD FOR THE MATRIX EFFECT IN X-RAY-FLUORESCENCE SPECTROMETRIC ANALYSIS

With the help of a fundamental parameter program, the matrix effect of multi-component complex samples and the composition of each element's X-ray fluorescence intensity were calculated. A mathematical model fo r correcting the multi-component matrix effect was deduced theoretical ly, It provides two methods for calculating theoretical influence coef ficients alpha and beta. The correction model and the influence coeffi cient introduced in this paper have clear and definite physical meanin gs, They gave satisfactory results when utilized in analyzing stainles s-steel samples, The results also indicate that the effect of tertiary fluorescence cannot be neglected in some cases, From the results of c omparison experiments, it is concluded that the tertiary fluorescence effect must be taken into consideration while analyzing Cr in a steel sample with a high concentration of Ni. (C) 1998 John Wiley & Sons, Lt d.