Kinetic fluorimetric determination of traces of vanadium(V) by means of a catalysed autoxidation process.
A kinetic method for determination of traces of vanadium(V) (0.04-0.5 ppm) is described. It is based on the catalytic action of vanadate in the autoxidation of sodium 4,8-diamino-1,5-dihydroxyanthraquinone-2,6-disulphonate, giving rise to kinetic curves characterized by an induction period before the appearance of a product exhibiting an intense red fluorescence in acidic solution. This product has been investigated and the experimental variables and interferences have been studied.
Sanchez
F G
FG
Department of Analytical Chemistry, Faculty of Sciences, University of Malaga, Spain.
Navas
A
A
Santiago
M
M
Grases
F
F