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A simple and sensitive kinetic-spectrophotometric method is described for the determination of vanadium and the possible mechanism of catalytic reaction is proposed. The method is based on the vanadium(V)-catalyzed oxidation of 1,8-diaminonaphthalene (DNA) by potassium bromate (Tiron as activator) at pH 3.8 and 40 o C. The reaction was monitored spectrophotometrically by measuring the increase...
Complexation of neodymium(III)–glutamate(glu)–phenanthroline(phen), neodymium(III)–aspartate(asp)–phenamhroline(phen) ternary systems and the corresponding binary systems in aqueous solution are discussed at various values of pH. Based on change regularity of hypersensitive transition intensities, the neodymium(III)–aspartate–phenanthroline ternary complex has a general formula of Nd(asp)3phen, but...
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