LAUSR

The ion specificity is ubiquitous in biological and colloidal phenomena. In this study, the Hofmeister effects have been observed in binding of univalent cations with the surfactant dimers. Chemometric analysis has also revealed that the ion specificity observed is mainly related to the effect of ions on the water structure, ie, to their kosmotropic and chaotropic properties. These ion properties, generally characteristic of aqueous solutions, are in accordance with the results of the principal component analysis (PCA) and cluster analysis (CA) used for the processing of mass spectrometric data obtained in vacuum, ie, in the medium drastically different then water. Such an application of the chemometric methods has not been presented so far.