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Determinação de fenóis bioativos em vinhos tintos da ?Campanha Gaúcha?. Repositório Alice
SILVA, L. F. da; GUERRA, C. C.; BERGOLD, A. M..
2015
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Química Enológica; Vinho tinto; Vinho Tinto da campanha gaúcha; Syrah; Malbec; Lambrusco; Cabernet Sauvignon; Vinho; Enologia.
Ano: 2015 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1033057
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Nutraceutical evaluation of red wines from 'Campanha Gaúcha' by a feasible HPLC-DAD method for bioactive polyphenols. Repositório Alice
SILVA, L. F. da; GUERRA, C. C.; CAVALCANTI, F. R.; BERGOLD, A. M..
This work proposes a fast HPLC-DAD method, without exhaustive manipulation of sample, for the analysis of seven BP (trans-resveratrol, quercetin, viniferin, rutin, kaempferol, myricetin and cinnamic acid) in red wines from CG.
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Avaliação nutraceutica de vinhos tintos; Vinho tinto; Bioativos polifenóis; Vinho; Nutraceuticals; Red wines.
Ano: 2014 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1003694
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Solid cation exchange phase to remove interfering anthocyanins in the analysis of other bioactive phenols in red wine. Repositório Alice
SILVA, L. F. da; GUERRA, C. C.; KLEIN, D.; BERGOLD, A. M..
Abstract Bioactive phenols (BPs) are often targets in red wine analysis. However, other compounds interfere in the liquid chromatography methods used for this analysis. Here, purification procedures were tested to eliminate anthocyanin interference during the determination of 19 red-wine BPs. Liquid chromatography, coupled to a diode array detector (HPLC-DAD) and a mass spectrometer (UPLC-MS), was used to compare the direct injection of the samples with solid-phase extractions: reversed-phase (C18) and strong cation-exchange (SCX). The HPLC-DAD method revealed that, out of 13 BPs, only six are selectively analyzed with or without C18 treatment, whereas SCX enabled the detection of all BPs. The recovery with SCX was above 86.6% for eight BPs. Moreover,...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Bioactive phenols; Red wine; Liquid Chromatography; Mass spectometry; Diode array detector; Sample purification.
Ano: 2017 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1062946
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Validation of a chromatographic method to routine analysis of transresveratrol and quercetin in red wines. Repositório Alice
SILVA, L. F. da; GUERRA, C. C.; CZERMAINSKI, A. B. C.; FERRARI, L.; BERGOLD, A. M..
Abstract ? The objective of this work was to validate a fast method with low-solvent use, for the analysis of trans-resveratrol and quercetin in red wines. The wines were prepared, using a classical method, from the grape (Vitis vinifera) cultivars Cabernet Franc, Cabernet Sauvignon, Malbec, Merlot, Petit Verdot, Pinot Noir, Ruby Cabernet, Syrah, Tannat, and Tempranillo. Samples were filtered and analyzed by high-pressure liquid chromatography (HPLC) with a diode array detector (DAD), at 306 and 371 nm, for trans-resveratrol and quercetin, respectively. An octylsilane column was used, and the mobile phase was composed by a gradient of methanol, water, and formic acid. The method was validated according to the following figures of merit: specificity,...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: High-pressure liquid chromatography; Quantification; Cultivars Cabernet Franc; Cabernet Sauvignon; Malbec; Merlot; Petit Verdot; Pinot Noir; Ruby Cabernet; Syrah; Tannat; Tempranillo; Vitis vinífera; Polyphenols.
Ano: 2017 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1071659
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Verification of the selectivity of a liquid chromatography method for determination of stilbenes and flavonols in red wines by mass spectrometry. Repositório Alice
SILVA, L. F. da; GUERRA, C. C.; FORESTI, A.; BERGOLD, A. M..
Abstract Quantification of bioactive phenols, like stilbenes and flavonols (SaF), has been conducted to evaluate the nutraceutical potential of red wines. However, there is still a lack of full validated, fast and accessible liquid chromatography methods offering high selectivity and a simple procedure. We present here the use of a high-resolution mass spectrometer to evaluate the selectivity of a feasible and traditional liquid chromatography technique (HPLC? DAD) to analyze markers of aglycone SaF in red wines. The SaF compounds were tested: trans-resveratrol, trans-eviniferin, quercetin, myricetin, and kaempferol, as well as trans-cinnamic acid, one of their precursors. System suitability and validation tests were employed for the selected conditions...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Vinhos tintos; Bioactive phenols; Red wine; Liquid chromatography; Mass spectrometry; Validation Ab.
Ano: 2016 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1063926
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