Spectrophotometric Method for the Determination of Nitrite and Nitrate
Pranab Kumar Tarafder
Broschiertes Buch

Spectrophotometric Method for the Determination of Nitrite and Nitrate

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The diazotisable amine, p-aminoacetophenone has been diazotized with nitrite in the presence of hydrochloric acid at room temperature, and the diazotized salt thus produced has been allowed to couple with the reagent, 2,3-dihydroxynaphthalene in alkaline medium to produce a reddish orange azo-dye suitable for the determination of nitrite at ppm level. The max of the azo-dye being 475 nm. The very azo-dye is extractable into an organic solvent like ethylacetate without shifting the max. Similarly, nitrate ion forms a strong reddish-yellow nitro product with 2,3 dihydroxynaphthalene in the prese...