Comparison of the affinity and selectivity of insoluble fibres and commercial proteins for wine proanthocyanidins

Keren Bindon, Paul Smith

    Research output: Contribution to journalArticle

    37 Citations (Scopus)

    Abstract

    The fining action of commercial proteins and insoluble fibres for wine proanthocyanidin (PA) were compared. Fibres were prepared from fresh apple and grape sources, and their corresponding pomaces. PA removal by fibre was via adsorption, and required a higher dose to achieve a fining effect comparable with proteins. A principal component analysis data model revealed that PA molecular mass was significant in defining the fining response, and reflected changes in the proportion of the dominant terminal PA subunits catechin and epicatechin, but not epicatechin-3-O-gallate. For PA extension subunits, changes in epigallocatechin were inversely correlated with epicatechin and epicatechin-3-O-gallate. Generally, the application of proteins and fibres reduced PA molecular mass. Selectivity for PAs by subunit composition was variable between treatments, but differences were minor. This work demonstrates the potential use of fibres as an alternative to proteins in winemaking. Benefits, and possible limitations of such an approach are discussed.

    Original languageEnglish
    Pages (from-to)917-928
    Number of pages12
    JournalFood Chemistry
    Volume136
    Issue number2
    DOIs
    Publication statusPublished - 15 Jan 2013

    Keywords

    • Cell wall
    • Fibre
    • Fining
    • Gelatin
    • Grape
    • Marc
    • Polysaccharide
    • Pomace
    • Proanthocyanidin
    • Protein
    • Tannin
    • Wine

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