Multi-Solvent Suppression Ultrafast 2D COSY for High-Throughput Wine Screening

Area of Science:

• Analytical Chemistry
• Spectroscopy
• Food Science

Background:

• Nuclear Magnetic Resonance (NMR) is crucial for wine metabolite analysis.
• 1D 1H NMR faces signal overlap issues in complex mixtures like wine.
• Conventional 2D NMR methods are time-consuming and struggle with water/ethanol signal interference.

Purpose of the Study:

• To develop a faster NMR method for wine analysis.
• To suppress interfering water and ethanol signals in wine NMR spectra.
• To enhance metabolite identification and discrimination in wine metabolomics.

Main Methods:

• Adaptation of interleaved ultrafast COSY (iuf-COSY) experiment for wine analysis.
• Utilized a shaped pulse and a NOESY block for efficient solvent signal suppression.
• Acquired a 2D COSY spectrum of wine within approximately 20 minutes.

Main Results:

• Successfully suppressed water and ethanol signals in wine NMR spectra.
• Identified important metabolites previously masked by solvent signals.
• Observed minimal interleaving artefacts in the resulting 2D COSY spectrum.

Conclusions:

• The adapted iuf-COSY is an efficient method for rapid wine NMR analysis.
• This technique aids in identifying and discriminating wine metabolites via additional cross peaks.
• The method supports high-throughput wine metabolomics, quality control, and authenticity studies.