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Photometric Assay of Nitrite in Various Samples | ||
| Rafidain Journal of Science | ||
| Article 7, Volume 24, Issue 2, 2013, Pages 60-83 PDF (0 K) | ||
| DOI: 10.33899/rjs.2013.67483 | ||
| Authors | ||
| Ammar M. Bilal; Wadala A. Bashir | ||
| Abstract | ||
| The assay is based on the reaction of nitrite in acidic medium with m-nitroaniline to form the corresponding diazonium ion which is coupled with N-(1-naphthyl)ethylenediamine to form a stable purplish azo dye that shows maximum absorption at 530 nm. Beer's law is obeyed over the concentration range 0.04-1.0 ppm. The molar absorptivity is (4.6x104l.mol-1.cm-1), and Sandell's sensitivity index of (0.1 ng. cm-2). The proposed method has been applied to the determination of nitrite in meat, water and soil. | ||
| Keywords | ||
| Nitrite determination; Diazo; coupling reaction; Spectrophotometry; Meat; Water; soil | ||
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