SOLID-PHASE VOLTAMMETRY WITH FLUORIDE-SELECTIVE ELECTRODE

Solid-phase reactions at the interface between LaF3 (Eu2+) monocrystal (the sensitive membrane of a fluoride-selective electrode) and a meta l (Ag, Sn, Bi, Sb, Ta, Nb, Ti) are studied by inversion and convention al voltammetry. It is found that the current peak of the cathodic curv es for decomposition of anodically generated compounds depends on the amount of electricity, which is consumed by formation of the solid pha se during anodic polarization of the LaF3/Me interface. It is determin ed that the peak potential of cathodic curves is related to the metal nature. These regularities may be applied to develop a voltammetric me thod with the use of fluoride-selective electrode with nonpolarizable reference system for analysis for metals in solid phases.