Extractive Spectrophotometric Determination of Iron (ii) with [n - (o -methoxy Benzaldehyde)- 2 - Amino Phenol]
نویسنده
چکیده
A simple, rapid and sensitive spectrophotometric method has been developed for the determination of Fe (II) by using N (o methoxy benzaldehyde) 2 aminophenol (NOMBAP) as an analytical reagent. NOMBAP has been synthesized and characterized by elemental and spectral analysis. NOMBAP extracts Fe (II) quantitatively (99.67%) into ethyl acetate from an aqueous solution of pH range 5.6 6.8. The ethyl acetate extract shows an intense peak at 470 nm (λ max).Beer’s law is obeyed over the Fe (II) concentration range of 1 7 μg/ml. The sandell’s sensitivity and molar absorptivity for Fe NOMBAP system is 0.0176 μgcm-2 and 3166 L mole-1 cm-1 respectively. The composition of extracted species is found to be 1:2 (Fe : NOMBAP) by Job’s Continuous Variation and Mole Ratio Method. The average of 10 determination of 50 μg of Fe (II) in 10cm3 of solution is 49.85 μg which is varied between 49.61 μg and 50.09 μg at 95% confidence limit and standard deviation is ±0.337. Interference by various ions has been studied. The proposed method has been successfully applied for determination of Fe (II) in Ore and Pharmaceutical samples.
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