Naslov
Determination of Stevioside by Square-wave Voltammetry

Autori
Komorsky-Lovrić, Šebojka ; Novak, Ivana ; Novak, Bruno

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

Izvornik
Book of Abstracts / B. Tribollet, C. Amatore - Nica : ISE, 2010, 204-204

Skup
61st Annual Meeting of the International Society of Electrochemistry

Mjesto i datum
Nica, Francuska, 26.09.2010. - 01.10.2010

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Stevioside; Square-wave Voltammetry

Sažetak
Steviol glycosides are electroactive compounds and can be detected by mercury electrode. The maxima of square-wave voltammograms of steviol and stevioside appear at -1.3 V vs Ag/AgCl in 1 M NaCl at approximately pH 11. The responses are quasireversible and probably caused by electro-reduction of carboxyl, or ester groups, respectively. The net peak current is linearly proportional to steviol concentration between 1 x 10-6 mol/L and 3.5 x 10-5 mol/L. This calibration plot can be used for the determination of the concentration of stevioside in extracts of stevia (Stevia rebaudiana Bertoni) leaves. The proposed method is applicable for routine analysis of stevioside in commercial products.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Poljoprivreda (agronomija), Prehrambena tehnologija

POVEZANOST RADA