Real-time monitoring of fermentation processes in wine production with benchtop H NMR spectroscopy.

The flexibility, affordability and ease of use of benchtop H NMR spectroscopy makes it potentially very interesting for assessing the quality of wine types and monitoring the fermentation process. However, the low spectral resolution of benchtop H NMR spectroscopy and the complexity of the mixtures hinder the direct quantification of important wine parameters and, thus, prevent its widespread use as an analytical tool in wineries. We show here that these problems can be solved using model-based data processing.

Overhauser Dynamic Nuclear Polarization Enables Single Scan Benchtop C NMR Spectroscopy in Continuous-Flow.

Benchtop C NMR spectroscopy is highly attractive for reaction and process monitoring. However, insufficient premagnetization and low signal intensities largely prevent its application to flowing liquids. We show that hyperpolarization by Overhauser dynamic nuclear polarization (ODNP) can be used to overcome these problems, as ODNP operates on short time scales and results in strong C signal enhancements.