Colour properties and tannin concentrations of polymeric phenolic materials extracted from Pinot Noir wines of a single NZ producer

Zhao, M; Harrison, Roland; Frost, A; Tian, Bin

Colour properties and tannin concentrations of polymeric phenolic materials extracted from Pinot Noir wines of a single NZ producer

2023

Zhao, M | Harrison, Roland | Frost, A | Tian, Bin

Polymeric phenolic material (PPM) was separated from monomeric anthocyanins by removing the latter using isoamyl alcohol in 22 Pinot Noir wines of different vintages and grades. The colour and tannin concentrations of PPM were determined using a modified Somers assay and methylcellulose precipitation (MCP) tannin assay, respectively. With wine age increasing, the ratio of absorbance at 520 nm at pH 1.0 to that at 3.4 decreased from 2.6 to 1.1. This decreasing trend with wine age is reported for the first time in Pinot Noir wines. The presence of bleachable polymeric pigments was also observed in PPM, and the degree of ionisation of these bleachable pigments increased along with wine age. Statistical analysis demonstrated the dominant effect of age on colour properties of PPM, regardless of vintage and grade. In contrast, total phenolics and tannin concentration mainly related to vintage, rather than age.

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Mots clés AGROVOC

colour tannin

Informations bibliographiques

Editeur

Wiley on behalf of Institute of Food, Science and Technology (IFSTTF)

D'autres materias

Anzsrc::300805 oenology and viticulture; Polymeric phenolic material; Anzsrc::3107 microbiology; Wine age; Anzsrc::4004 chemical engineering; Wine grade; Anzsrc::300601 beverage chemistry and beverage sensory science; Anzsrc::3210 nutrition and dietetics; Anzsrc::3006 food sciences

Langue

anglais

Format

pp.4761-4769

Licence

© 2023 The Authors. International Journal of Food Science & Technology published by John Wiley & Sons Ltd on behalf of Institute of Food, Science and Technology (IFSTTF)., https://creativecommons.org/licenses/by-nc-nd/4.0/, Attribution-NonCommercial-NoDerivatives

ISSN

0950-5423, 1365-2621

Type

Journal Article

Sur AGRIS depuis: 2024-12-20

Date de modification: 2025-04-17

Format: Dublin Core

Fournisseur de données

Cette notice bibliographique a été fournie par Lincoln University

Découvrez la collection de ce fournisseur de données dans AGRIS

Liens

DOI https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=elements_prod&SrcAuth=WosAPI&KeyUT=WOS:001030795600001&DestLinkType=FullRecord&DestApp=WOS_CPL https://hdl.handle.net/10182/16435