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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.

The conditions for the reaction of triterpenoids with concentrated sulfuric acid have been studied by the method of mathematical planning, and the optimum conditions for performing this reaction have been found.

In concentrated sulfuric acid, triterpene compounds have one common characteristic absorption maximum in the UV region of the spectrum at 310 nm; this maximum does not change with the introduction of various substituents into the molecule.

The reductive acetylation of quercetin under the action of various reducing agents and of different times and temperatures, and also the conversion of the flavonols obtained into cyanidin chloride have been studied by the methods of the mathematical planning of experimentation.