Photometric determination of vanadium(V) after adsorption of its schiff's base (derived from 2-aminopyridine and naphthalene-1-carbaldehyde) complex on polyurethane foam

Abstract

The absorbance of vanadium(V) complex of schiff's base derived from 2-aminopyridine and naphthalenel- carbaldehyde after prelintinary adsorption of polyurethane foam has been studied. It is found that Beer's law is obeyed over the concentration range 10<em>85 </em><em>m</em>g of vanadium(V) in 10 ml chloroform. Molar absorptivity and sensitivity are calculated to be 6.6 x 10⁴ 1 mol^-1 cm^-1 and 0<em>.061 </em><em>m</em><em>g </em>cm^-2 of V(V) respectively at 495 nm. The effects of <em>p</em>H<em>, </em>reagent concentration, absorbent, diverse metal ions on photometric determination of vanadium have been studied. The method has been applied satisfactorily for determination of vanadium in OHNS steel alloy sample.