FIELD: chemistry.
SUBSTANCE: invention can be used for their determination in potable and mineral waters. To this, a solution of nitrite and placed in a polymethacrylate membrane immobilized Safranin thereby bleaching colored matrix by diazotization reaction safranin. Membrane is then separated from the solution and evaluate the content of nitrite ions on the color intensity of the optical membrane by spectrophotometry at 530 nm on the calibration curve or visual test method using a color scale. In order to reduce the detection limit of the method used nitrite additives.
EFFECT: invention provides a simple and quick way to determine the content of nitrite ions in the water.
1 cl, 1 tbl, 2 dwg, 4 ex
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