FIELD: chemistry.
SUBSTANCE: method of determining free salicylic acid in aspirin involves preparation of the analysed sample, involving transfer of salicylic acid into a solution by dissolving the analysed sample in glacial acetic acid and bringing the obtained solution to a defined volume by adding distilled water. The sample is put into an amperometric cell containing a photogenerated amount of bromine. Change in current flowing through the cell is recorded and salicylic acid is determined from a calibration curve.
EFFECT: simple method, wider range of analytical methods of determining partially water-soluble organic acids in aspirin.
2 tbl, 2 dwg
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