VOLTAMETRIC METHOD FOR QUANTITATIVE DETERMINATION OF BENZOIC ACID

摘要

FIELD: chemistry.SUBSTANCE: invention relates to analytical chemistry. The method is characterised by electrochemically concentrating benzoic acid on the surface of a graphite electrode for 90 s at electrolysis potential of (-0.500) V on a background of 0.1 mol/l sodium hydrogen phosphate, recording polarisation curves with linear potential sweep rate of 25 mV/s and determining concentration of benzoic acid from the peak height in potential range of 0.5-1.6 V relative to a silver chloride electrode.EFFECT: method provides highly sensitive and rapid determination of benzoic acid in medicinal drugs.3 ex, 6 tbl