[Infra-red spectrometry in oral liquid study for diagnostic purposes].

Infra-red (IR) spectrometry of the saliva was done by means of specially developed hardware-software complex. It was established, that in 9 wide ranges of the IR-spectrum there were diverse fluctuations of transmittance that characterize intermolecular interactions of various molecules associated with water and metabolites of biological systems. The found fluctuations were characterized quantitatively by dispersion of transmittance coefficients. It gave chance on 9 values of the given values by means of multidimensional analysis (Mahalanobis distance and Bartlett's criteria) defined on various frequencies of spectrum in comparison with the standard, quantitatively characterize the state of biological liquid that can be used 4 diagnostic purposes.