FIELD: analytical methods. SUBSTANCE: in a method, which involves modifying resonator electrodes by sorbent and piezoquartz detection and regeneration of sensor, novelty consists in that sensor electrode modifier is selected from polyethylene glycol-2000, polyethylene glycol adipate, and trioctylamine oxide, applied in amounts 5-7 mcg on strain-sensitive region of electrodes and the dried for 2 h. Method allows full analysis to be reduced by 1.5-2 times and, in re-determination on the same sorbent by 3-4 times. Analysis error is reduced by 5-7% and sensitivity of resonator for toluidines rises by 2 times. EFFECT: accelerated analytical procedure and improved accuracy, sensitivity, and selectivity of determination. 3 dwg, 3 tbl, 8 ex
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