6533b7d9fe1ef96bd126c3c2
RESEARCH PRODUCT
Multispectral fluorescence sensitivity to acidic and polyphenolic changes in Chardonnay wines – The case study of malolactic fermentation
Pascale WincklerAmbroise MarinJean-marie Perrier-cornetChristian CoelhoChristian CoelhoMaxime Pachecosubject
PARAFAC componentsMultispectral imageMalatesWine010402 general chemistry01 natural sciencesFluorescenceAnalytical Chemistrychemistry.chemical_compoundFluorescence lifetimeOrganic acidsMalolactic fermentationPhenol[SDV.BBM]Life Sciences [q-bio]/Biochemistry Molecular BiologyWineExcitation emission matrixQuenching (fluorescence)ChromatographyChemistryMalolactic fermentation010401 analytical chemistryPhasor plotTraceabilityGeneral MedicineFluorescence0104 chemical sciencesPolyphenolFermentation[SDV.AEN]Life Sciences [q-bio]/Food and NutritionFood Sciencedescription
International audience; In this study, stationary and time-resolvedfluorescence signatures, were statistically and chemometrically analyzed among three typologies of Chardonnay wines (A, B and C) with the objectives to evaluate their sensitivity to acidic and polyphenolic changes. For that purpose, a dataset was built using Excitation Emission Matrices of fluorescence (N = 103) decomposed by a Parallel Factor Analysis (PARAFAC), andfluorescence decays (N = 22), mathematically fitted, using the conventional exponential modeling and the phasor plot representation. Wine PARAFAC component C4 coupledwith its phasor plot g and s values enable the description of malolactic fermentation (MLF) occurrence in Chardonnay wines. Such proxies reflect wine concentration modifications in total acidity, malic/lactic and phenol acids.Lower g values among fresh MLF + wines compared to MLF- wines are explained by a quenching effect on wine fluorophores by both organic and phenolic acids.The combination of multispectral fluorescence parametersopens a novel routinely implementable methodology to diagnose fermentative processes.
year | journal | country | edition | language |
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2022-02-01 | Food Chemistry |