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The antioxidant activity of rutin and selected common buckwheat-originated materials, namely groat, hull, flour and sprouts were measured against stable, non-biological radicals such as 2,2’-azinobis-(3-ethylbenzothiazoline-6-sulphonate) radical cation (ABTS•+) and 2,2-diphenyl-1-picrylhydrazyl radical (DPPH•) using a spectrophotometric assay, against the key reactive oxygen intermediate – superoxide...
Quercetin (Q), quercetin-3,4′-diO-β-glucoside (Q3,4′G), quercetin-3-O-β-glucoside (Q3G) and quercetin-4′-O-β-glucoside (Q4′G) were determined in onion bulbs (Allium cepa) by HPLC with amperometric detection after analysis of the hydrodynamic voltammograms of flavonoid standards within the potential range of 50–1000mV and by cyclic voltammetry (CV) method. The hydrodynamic voltammetric profiles of...
This paper describes the use of photochemiluminescence (PCL), spectrophotometric methods (TEAC, FCR reducing capacity) and cyclic voltammetry for the measurement of the antioxidant capacity of roots obtained from dark- and light-grown buckwheat sprouts. A 80% methanol was used for the preparation of extracts originated from roots separated from 6 and 8 DAS (days after seeding) buckwheat sprouts. The...
The micro gold electrode modified by thiol layer was used as a working electrode in the cyclic voltammetry method. This analytical system was used for determining the neutral smell compounds: geraniol and coumarin. The decrease in reduction current value of [Fe(CN)6]-3 ions was observed already at the concentration of 10-5 M of the compound investigated. The dimensions of these changes were different...
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