Zannat, T. and Ahmed, M.J. 2015. Highly sensitive spectrophotometric method for the determination of vanadium in environmental, biological, food and soil samples using orthoaminophenol. European Journal of Chemistry. 6, 2 (Jun. 2015), 141–150. DOI:https://doi.org/10.5155/eurjchem.6.2.141-150.1193.