Defining and Deriving Theoretical Influence Coefficients in XHF Spectrometry

The concepts underlying the definition and calculation of fundamental influence coefficients and their role in the computation of derived coefficients in alpha-type algorithms are examined. The fundamental-parameter method initiated and continues to provide the basis for the steady progress in giving influence coefficients a sound theoretical status. New definitions of fundamental influence coefficients as the prorating of monochromatic coefficients on the basis of the intensities of each elementary contributions as a function of the total fluorescence intensity and of the intensity of the pure analyte are compared to the presently used approach of defining coefficients as a function of total absorption only.