التقدير الطيفي لبارا-امينوفينول و ميتا-امينوفينول في خليطيهما باستخدام الكاشف رباعي سيانواثيلين في المحلول المائي

Abstract EN

A simple and selective spectrophotometric method is described for the determination of p-aminophenol and m-aminophenol alone and in admixture.

The analysis is based on the reaction of tetracyanoethylene reagent with the above amines in basic aqueous solution of sodium hydroxide forming two products having absorption bands at max at 350 nm for p-aminophenol and at 466 and 350 nm for m-aminophenol.

Beer's law is obeyed in the range of 1-24 'g / ml for p-aminophenol at 350 nm and 2-34nm for m-aminophenol at 466nm.

The determination of amines in admixture is mainly depended on the measurement of absorbances of complexes using two identical sets of solutions, each at its λmax and under its respective optimised conditions.

The accuracy (average recovery %) are 99.66 % and 100.51 % for p-aminophenol and m-aminophenol respectively with precision (RSD) less than 1.7 % for the two components in admixture.