| Literature DB >> 30100418 |
Maria da Conceição Prudêncio Dutra1, Lucicleide Leonice Rodrigues2, Débora de Oliveira3, Giuliano Elias Pereira4, Marcos Dos Santos Lima5.
Abstract
The phenolic profile and antioxidant activity (AOX) of "organic vs. conventional" Brazilian wines and grape juices were analyzed. A simple method for the determination of minerals Cu, Fe and Mn by F-AAS was validated and used to characterize the samples studied. In the validation of the Cu, Fe and Mn determination method, the protocol for samples preparation by hot digestion with HNO3 + H2O2 proved to be more suitable for the grape juice and wine matrices. The validation parameters were considered satisfactory. Conventional products presented higher anthocyanins content, and no significant differences were observed on other phenolic compounds, AOX and Cu, Fe and Mn minerals. All the evaluated samples presented similar results between the same cultivars and in products from grapes of the two cultivation systems. The AOX of juices and wines, organic and conventional, was high, and correlated with procyanidin B1, petunidin-3-glucoside and cyanidin-3,5-diglucoside.Entities:
Keywords: Bioactive compounds; Food analysis; Minerals; Organic agriculture; Vitis labrusca L.
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Year: 2018 PMID： 30100418 DOI： 10.1016/j.foodchem.2018.07.014
Source DB: PubMed Journal: Food Chem ISSN： 0308-8146 Impact factor: 7.514