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The Use of 2,3-dichloro-1,4-naphthaquinone for the Spectrophotometric Determination of Some Primary Aliphatic Amines in Aqueous Solution | ||
| Journal of Education and Science | ||
| Article 5, Volume 22, Issue 1, 2009, Pages 43-53 PDF (0 K) | ||
| DOI: 10.33899/edusj.2009.57441 | ||
| Authors | ||
| Thabit S. Al-Ghabsha* 1; Theiaa Al-Sabha1; Usra I Al-Neaimy2 | ||
| 1Department of Chemistry, College of Education, University of Mosul, Mosul, Iraq | ||
| 2College of Veterinary Medicine, Mosul University, Mosul, Iraq | ||
| Abstract | ||
| Abstract A simple and accurate spectrophotometric method was developed for the quantitative determination of some primary aliphatic amines in aqueous solution, i.e. ethanolamine, n-butylamine and n-hexylamine. The method is based on the interaction of these amines in aqueous medium with 2,3-dichloro-1,4-naphthaquinone (DClNQ) reagent in the presence of bicarbonate buffer solution to form an orange coloured products measurable at maximum wavelength of 475 nm. Beer’s law is obeyed over the concentration range of 1-30, 5-20 and 3-30g/ml for ethanolamine, n-butylamine and n-hexylamine respectively. The DClNQ products were formed in the ratio of 1:1 amine: DClNQ, and their stability constants were ranged between 1.92105 and 4.14105 L.mol-1. The method was successfully applied for the determination of ethanolamine in its pharmaceutical preparation. | ||
| Keywords | ||
| 2; 3-dichloro-1; 4-naphthaquinone; Primary Aliphatic Amines; aqueous solution | ||
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