Today the developing of multitsensor systems for identification of the nature of multicomponent mixtures is of a great interest. The main goal here is not to identify the concrete substance in a complex mixture but to find out does the mixture meet some requirements, e.g. standards. Such systems also allow to analyze some general quality properties of multicomponent solutions either in-line or on-line.

In the present work the combination of voltammetric system of tubular electrodes and projection on latent structure discriminant analysis (PLS-DA) were applied for identification and classification of investigated electrolyte solutions. The results of the investigations show, that the identification is possible for groups of solutions, but not for individual salts.