(Article)
Faculty of Chemistry, Nicolaus Copernicus University in Toruń, 7 Gagarin Street, Toruń, Poland
Abstract
Antioxidant capacity (AC) of Brassica oilseeds, white flakes and meal was determined by a new spectrophotometric method. The proposed assay (AuNP) based on the formation of gold nanoparticles (AuNPs) in an acetic buffer medium (pH = 4.6) was compared with the previously described silver nanoparticle-based (AgNP), ferric reducing antioxidant power (FRAP), 2,2-diphenyl-1-picrylhydrazyl (DPPH) and Folin-Ciocalteu (FC) procedures. The novel AuNP method was validated using standard antioxidants such as phenolic acids and quercetin. The AC of rapeseed, white flakes and meal varied from 10.0 to 86.7 μmol sinapic acid (SA)/g, 26.5-160.3 μmol SA/g, 6.8-103.0 μmol SA/g, 23.0-259.3 μmol SA/g and 6.9-92.1 μmol SA/g for AuNP, AgNP, FRAP, DPPH and FC methods, respectively. The proposed AuNP method is simple, precise (intra-day RSD = 0.27-2.11% and inter-day RSD = 2.05-4.87%) and accurate (recovery = 96.2-104.3%) and can be useful in the routine analysis of the AC. © 2016 Elsevier Ltd. All rights reserved.
Author keywords
Antioxidant potential; Chemometric analysis; Gold nanoparticles; Rapeseed products; Spectrophotometric methods
Indexed keywords
Engineering controlled terms: Agents; Antioxidants; Fiber optic sensors; Gold; Metal nanoparticles; Nanoparticles; Oilseeds; Spectrophotometers; Spectrophotometry
Antioxidant potential; Chemometric analysis; Gold Nanoparticles; Rapeseed products; Spectro-photometric method
Engineering main heading: Silver
ISSN: 03088146 CODEN: FOCHDSource Type: Journal Original language: English
DOI: 10.1016/j.foodchem.2016.03.105Document Type: Article
Publisher: Elsevier Ltd
