Photometric Assay of Nitrite in Various Samples

Section: Article
Published
Jun 24, 2025
Pages
60-83

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.

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How to Cite

M. Bilal, A., عمار, A. Bashir, W., & وعد. (2025). Photometric Assay of Nitrite in Various Samples. Rafidain Journal of Science, 24(2), 60–83. https://doi.org/10.33899/rjs.2013.67483