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Spectrophotometric Determination of Some Phenolic Compounds Using N,N- diethyl –p-phenylenediamine (DE – PPD) and Benzoyl peroxide | ||
| Journal of Education and Science | ||
| Article 2, Volume 26, Issue 3, 2013, Pages 8-17 PDF (0 K) | ||
| DOI: 10.33899/edusj.2013.89913 | ||
| Authors | ||
| Elham S. Salih* ; M. M. Al- sharook* ; Saladdin M. AL-Talib* | ||
| Abstract | ||
| ABSTRACT A rapid and sensitive spectrophotometric method has been developed for the determination of some phenolic compounds (phenol, o-aminophenol and α-naphthol) and was applied for determination of amoxicillin drug. The method is based on oxidative coupling reaction of these compounds with N,N-diethyl-p-phenylenediamine in the presence of benzoyl peroxide as oxidizing agent. The formed blue indophenol dyes have maximum absorptions at 627, 612.5, 611.5 and 628.5 nm. for phenol, o-aminophenol, α-naphthol and amoxicillin respectively. The molar absorptivities are 1.72× 104, 1.92× 104, 1.65 × 104. l. mol1-. cm-1 for concentrations obeyed Beer,s law in the ranges 0.2 -4.0, 0.5 -11.0, 0.6 – 16.0 and 0.8 – 25.0 µg ml-1 for the above compounds respectively. The average recovery % was ranged between 98.99% 100.45 with relative standard deviation ≤ 1.04 for all the studied compounds. The method is applied | ||
| Keywords | ||
| Spectrophotometric determination; Phenolic compounds; N,N- diethyl –p-phenylenediamine (DE – PPD); Benzoyl peroxide | ||
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