METHOD FOR VOLTAMMETRIC DETERMINATION OF Fe₂O₃ NANOPARTICLES ON CARBON PASTE ELECTRODE

摘要

FIELD: chemistry.;SUBSTANCE: method for voltammetric determination of Fe₂O₃ nanoparticles on a carbon paste electrode according to the invention involves electrochemical conversion of Fe₂O₃ nanoparticles on a carbon paste electrode in a background electrolyte of 0.02 mol/dm³ trilon B solution (pH 3-4) at electrolysis potential of (-0.12±0.01)V relative a silver chloride electrode, followed by detection of the anode peak in direct current conditions of recording voltage versus current curves with potential sweep rate of 80-90 mV/s, wherein concentration of Fe₂O₃ is determined from the height of the anode peak in the potential range of (-0.12±0.01)V.;EFFECT: invention enables to obtain an analytical signal for electro-conversion of Fe₂O₃ nanoparticles, which in turn enables to perform identification and quantitative determination of Fe₂O₃ nanoparticles on a carbon paste electrode using a voltammetric technique.;3 dwg, 1 ex