Spectrophotometric Microdetermination of Fe(III) and V(V) Using Schiff Base Derived from Salicylhydroxamic Acid
نویسندگان
چکیده
A simple, rapid, accurate, precise and sensitive spectrophotometric method for determination of Fe and V in bulk sample using Schiff base derived from salicylhydroxamic acid is described. The method is based on the formation of coloured complexes in weak acidic medium. The coloured products have showed absorption band at λmax 460 nm for Fe +3 – complex and also absorption band at λmax 632 nm for V +5 –complex, respectively . The apparent molar ratio of complexes are (1:1) and (1:2) M : L in 20 % (v/v ) ethanol solution as well as the formation constants for Fe-complexes are 4.29 and 8.2, and for V-complexes are 5.33and 8.54, respectively. Beers law is obeyed in the concentration ranges 0.11-2.80 μg ml for Fe and 1.34 – 6.69 μg ml for V The apparent molar absorptivity , relative standard deviations and recoveries are calculated and the effect of foreign ions is also discussed.
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