Naslov
Abrasive stripping voltammetry of myricetin and dihydromyricetin

Autori
Komorsky-Lovrić, Šebojka ; Novak, Ivana

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Book of abstracts / Ignacio González, Yunny Meas - Santiago de Querétaro : ISE Meksiko, 2013, 224-224

Skup
64th ISE meeting

Mjesto i datum
Querétaro, Meksiko, 08.09.2013. - 13.09.2013

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
abrasive stripping voltammetry; myricetin; dihydromyricetin

Sažetak
Voltammetry of microcrystals, or abrasive stripping voltammetry is an electrochemical technique in which microparticles of water-insoluble substances are mechanically transferred onto a surface of working electrode and immersed into an aqueous electrolyte [1]. In the present communication, the application of this technique in the measurement of voltammetric potentials of powders of myricetin and dihydromyricetin are reported. Both compounds are flavonoids that are found in many grapes, fruits and vegetables in the form of glycosides. The first electrode reaction of both compounds is reversible, two-electrons, two-protons oxidation of pyrogallol group with E7 = 0.300 V vs. NHE. This makes them as potent antioxidants as quercetin. The second and the third electrode reactions are irreversible, one-electron, one-proton oxidations of hydroxyl groups. The responses of immobilized microparticles are similar to the characteristics of dissolved compounds. These results demonstrate that the applied technique is useful for the measurement of solid state reactivity of antioxidants. 1. Š. Komorsky-Lovrić, I. Novak, J. Food Sci. 76 (2011) C 916. Structural formulae of myricetin (A) and dihydromyricetin (B).

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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