Spectrophotometric Determination of Aniline by Azo-Dye Formation with 2, 6-Dihydroxybenzoic Acid-Application to waters
| Autor: | Saad EL Sultan, Inam A. Hamdon, s Nabeel S. Othman |
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| Jazyk: | Arabic<br />English |
| Rok vydání: | 2006 |
| Předmět: | |
| Zdroj: | مجلة التربية والعلم, Vol 18, Iss 2, Pp 24-32 (2006) |
| Druh dokumentu: | article |
| ISSN: | 1812-125X 2664-2530 |
| DOI: | 10.33899/edusj.2006.78743 |
| Popis: | 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. |
| Databáze: | Directory of Open Access Journals |
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