FIELD: chemistry.
SUBSTANCE: chloroanilines are modified into bromine derivatives and extraction concentration and gas-chromatographic detection is carried out. The additional modifier reactant used is trifluoroacetic anhydride in amount of 3-15% of the mass of the extract. Bromine derivatives of chloroanilines are obtained before the extraction concentration step in aqueous medium, in the presence of potassium bromide in amount of 0.5-2.5% of the mass of the water sample.
EFFECT: invention enables to lower the detection limit, increase selectivity of chromatographic separation, reduce the number of steps and duration of the analytical cycle of detecting chloroanilines in water.
3 dwg, 3 tbl, 7 ex
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