Spectrophotometric determination of trace amount of Vanadium in rise and flour using 1-[(4-antipyl azo)] 2-Naphthol as new chromogenic spectrophotometry

The study included follow-up of the interaction of the prepared reagent 1- (4 -Anti-pyrail-Azo) 2- naphthol (APANOL) with vanadium (V) ion, which gave a greater wavelength of absorption (533) nm as well as a study of the best conditions of the size and concentration of the reagent (1 × 10-3) molar and acidic function (pH = 3) and the stability of the complex for more than two hours and temperature from 10 to 40 degrees Celsius and the linearity range falls within the concentrations (0.10-4.00) ppm and correlation coefficient (R2 = 0.9945) and the value of molar absorption coefficient ε (1.02 x 104) l. Mol-1 cm-1 and sandal allergy (0.004) micrograms cm-2. And determined the accuracy and accuracy of the analytical method followed using standard solutions of ion with a standard concentration of the reagent, so the frequency (RSD %) with respect to concentrations (2.00, 3.00) ppm of vanadium ion (V) equal to (0.9 and 0.9), Erel. %) Was equal to (0.2, 0.3) %