Extraction and Spectrophotometric Determination of Vanadium (V) from N-m-Tolyl-o-Methoxybenzohydroxamic Acid

Abstract The reagent N-m-tolyl-o-methoxybenzohydroxamic acid is proposed for the rapid extraction and simultaneous Spectrophotometric determination of vanadium in the presence of commonly occurring metal ions. It forms an intense violet colored complex with vanadium and the complex can be extracted by chloroform from 6–8 M HCl. The violet complex obeys BeeR′s Law at λmax (550 mm) with the molecular absorptivity 6.5 × 103 and sensitivity 0.01 μg of V/cm2. The effects of acidity, reagent concentration, and diverse ions on the extraction are discussed.