METHOD OF MONOAZO DYE E102 EXTRACTION FROM WATER SOLUTIONS IN PRESENCE OF MONOAZO DYE E122

摘要

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= [(A_init-A_equil)*100%]/A_init, where A_init, A_equil are filtrate optical densities before and after filtration.;EFFECT: invention provides the maximal completeness of the extraction.;1 ex