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Spectrophotometric Determination of Aniline by Azo-Dye Formation with 2, 6-Dihydroxybenzoic Acid-Application to waters | ||
| Journal of Education and Science | ||
| Article 3, Volume 18, Issue 2, 2006, Pages 24-32 PDF (0 K) | ||
| DOI: 10.33899/edusj.2006.78743 | ||
| Authors | ||
| Saad EL Sultan; Inam A. Hamdon; s Nabeel S. Othman | ||
| Abstract | ||
| A simple and sensitive Spectrophotometric method for the determination of aniline in aqueous medium is described. The method is based on the formation of a yellow coloured azo product from the diazotisation of aniline followed by a coupling reaction with 2,6-dihydroxybenzoic acid in the presence of sodium carbonate. Absorbance of the resulting yellow azo dye is measured at 432 nrn and is stable for 1 hour at least. Beer's law is obeyed in the concentration range of 5-80|ig of aniline in a final volume of 25ml, with a molar absorptivity of 4.2xl04l.morl.cm"!, a relative error of +1.13 to+ 4.40 % and a relative standard deviation of ±0.30 to ±0.76%, depending on the concentration level. The method is successfully employed for the determination of aniline in river and waste waters. | ||
| Keywords | ||
| aniline; Azo-Dye Formation; Dihydroxybenzoic Acid | ||
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