FIELD: analytical chemistry of organic compounds. SUBSTANCE: concentration of 2-naphthol from an aqueous sample is carried out by extraction with a mixture in the following ratio of components, wt.-%: nonane, 30-0; hexanol, 70-100. Mixture is applied preliminary on polyurethane foam. Method provides practically complete extraction of 2-naphthol with coefficient of concentration = 340-350. Invention can be used for concentration of 2-naphthol in analytical control of treated sewages from plants producing and using synthetic dyes. EFFECT: improved method of concentration. 2 tbl
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