Abstract
A catalytic photometric method (or determining a nanogram level of vanadium(IV) and vanadium(V) is proposed. The method is based on their catalytic effect on the oxidative coupling reaction of 4-aminoantipyrine with N,N-dimethylaniline in the presence of bromate and sulfosalycilic acid. The vanadium concentrations as low as 10-9 M can be easily determined by measuring the absorbance of dye formed at a fixed time. The reproducibility of the method is satisfactory with the relative standard deviations of less than 3% and there are few interfering ions. The method has been applied to the determination of vanadium in natural waters.
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Nakano, S., Yamada, C., Sakai, M. et al. Catalytic Determination of Nanogram Amounts of Vanadium by the Oxidative Coupling Reaction of 4-Aminoantipyrine with N,N-Dimethylaniline. ANAL. SCI. 2, 61–65 (1986). https://doi.org/10.2116/analsci.2.61
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DOI: https://doi.org/10.2116/analsci.2.61