A Uniform Nonlinearity Criterion Resulting from Normalization of Nonlinear Models Applied for Calibration Curve and Standard Addition Methods

Anna Maria Michałowska-

Abstract

It is proved that the shape of equations obtained after transformation of real (x, y) into normalised (u, v) variables enables to present polynomial and rational functions in a unified form. In terms of normalised variables, the equations applicable for calibration curves are analogous to ones obtained for standard addition method. It enables to apply a common criterion adaptable for both methods of chemical analysis.