FIELD: analytical chemistry. SUBSTANCE: method involves concentration of phenol and nitro-derivatives from aqueous solution with methylethylketone in the presence of ammonium sulfate which is taken at concentration 40-43 wt. - % relation to analyzing aqueous sample. Phenol is determined by potentiometric titration in the medium of acetonitrile with isopropanol solution of potassium hydroxide. Method is used for determination of organic compounds. EFFECT: improved method of assay. 1 tbl
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