FIELD: chemistry.
SUBSTANCE: invention refers to the analytical chemistry of organic compounds with respect to monoazo dye extraction from water media. The method includes: a) the addition of the crystalline ammonium sulphate to the water solution of monoazo dye E102 and E122 mixture up to its concentration 43 wt %; b) separation by filtering of the monoazo dye E122 segregated due to desalting; c) acetone addition to the filtrate in volume ratio acetone: water solution = 1:10 and d) monoazo dye E102 extraction during 10 min and separation of the water phase. The content of monoazo dye E102 in water phase is determined spectrophotometrically; the rate of extraction (R%) was calculated by formula: R= [(Ainit-Aequil)*100%]/Ainit, where Ainit, Aequil are filtrate optical densities before and after filtration.
EFFECT: invention provides the maximal completeness of the extraction.
1 ex
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