Spectrophotometric determination of vanadium(V) using methdilazine hydrochloride in minerals and steel samples

1107-1109Methdilazine hydrochloride has been used as a sensitive and selective reagent for the rapid spectrophotometric determination of vanadium(V). The reagent gives instantaneously a red coloured species on reaction with vanadium(V) in phosphoric acid medium and exhibits maximum absorbance at 512 nm with Sandell's sensitivity of 6.72 ng cm-2. Beer's law is obeyed over the concentration range 0.2-5.4 ppm; the optimum concentration range is 0.5-5.0 ppm. The method has been successfully applied to the analysis of vanadium steels and minerals