This article presents the electrochemical analysis of the oxidation of rutin and green tea
extract solutions and the antioxidative properties of these substances. Flavonoids and
other polyphenols contained in green tea have antioxidative properties due to the
presence of various numbers of hydroxyl groups in different arrangements. The
investigation of the oxidation of green tea extracts was performed to identify the most
effective antioxidant. The cyclic and pulse voltammograms show that the extract of Gun
Powder (GP) green tea contained rutin and other polyphenols, while the extract of Sencha
(S) tea contained other antioxidants that are oxidised at a more positive potential. The GP
extract showed slightly better antioxidative properties than did the S extract. The UV-VIS
spectra show that, in addition to flavonoids extracts contain chlorophyll. The results
obtained demonstrate that the tested tea extracts show very good antioxidative properties
and therefore may be considered as potential stabilising agents that are able to reduce the
rate of undesirable oxidation processes.