It has been shown that in the oscillopolarography of rutin the electrochemical reduction is affected by the pH of the solution and the concentration of ethanol. Protonation of the rutin molecules and their adsorption on the electrode in aqueous solutions are observed. The adsorption is reduced by increasing the concentration of ethanol to 50%. The change in current at various pH values with a constant concentration of rutin is due to a change in the concentration of protonated and ionized polarographically active forms of rutin. Conditions for the quantitative analysis of rutin have been found.