1. Exploring the chemical space of white wine antioxidant capacity: A combined DPPH, EPR and FT-ICR-MS study
- Author
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Florian Bahut, Philippe Schmitt-Kopplin, Maria Nikolantonaki, Zina Sarhane, Rémy Romanet, Régis D. Gougeon, and Jenny Uhl
- Subjects
Antioxidant ,DPPH ,medicine.medical_treatment ,Wine ,01 natural sciences ,Antioxidants ,Mass Spectrometry ,Fourier transform ion cyclotron resonance ,Analytical Chemistry ,law.invention ,chemistry.chemical_compound ,0404 agricultural biotechnology ,Phenols ,law ,medicine ,Metabolome ,Cluster Analysis ,Electron paramagnetic resonance ,Principal Component Analysis ,Chromatography ,Chemistry ,010401 analytical chemistry ,Electron Spin Resonance Spectroscopy ,Discriminant Analysis ,04 agricultural and veterinary sciences ,General Medicine ,040401 food science ,0104 chemical sciences ,White Wine ,Mass spectrum ,Sugars ,Food Science - Abstract
The chemical composition and functionality of molecular fractions associated with dry white wines oxidative stability remain poorly understood. In the present study, DPPH assay, electron paramagnetic resonance spectroscopy (EPR) and Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS) were used to explore the chemical diversity associated with the antioxidant capacity (AC) of white wines. AC determined using the DPPH assay and EPR were complementary and enabled differentiation of wine samples into groups with low, medium, and high AC. Mass spectra variations associated with global DPPH- and EPR-derived indices enabled identification of 365 molecular markers correlated with samples with high AC, of which 32% were CHO compounds including phenolic and sugar derivatives, 20% were CHOS and 36% were CHONS compounds including cysteine-containing peptides. This study confirmed the importance of CHONS and CHOS compounds in the antioxidant metabolome of dry white wines. Knowledge about these compounds will enable better understanding of the oxidative stability of white wines and therefore aid in achieving optimum shelf life.
- Published
- 2021