ISOLATION OF DETERMINED COMPONENT OF EMPIRICAL DEPENDENCES OF PHYSICOCHEMICAL PROPERTIES OF BINARY SOLUTIONS ON THE COMPOSITION

Abstract

An algorithm for separating deterministic and stochastic contribution to the empirical dependence of physicochemical properties of binary solutions on concentrations of the components based on the expansion of the function in a Fourier series has been done in this study. The isolation of a non-additive part of dependence of physicochemical characteristics on concentration of the components in the solution gives a possibility to formulate the algorithm of analytical continuation to the formal negative values of concentrations that make no break to the function and its first and second derivatives. The criteria of qualitative separation of deterministic and stochastic harmonics and the basic set of three-parameter regression description of isobar boiling point of binary solution have been determined. Two-stage algorithm of regressive description of dependence of boiling point of binary aqueous-organic solutions on composition has been formulated. The calculations of the contribution and number of stochastic determined harmonics in the experimental data for aqueous-organic solutions, which have a great practical importance, are shown in this work. It was found that the relative error of the proposed regressive model does not exceed 2% and can be defined only by experimental errors.