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Bodart, P.R.* ; Rachocki, A.* ; Tritt-Goc, J.* ; Michalke, B. ; Schmitt-Kopplin, P. ; Karbowiak, T.* ; Gougeon, R.D.*

Quantification of manganous ions in wine by NMR relaxometry.

Talanta 209:120561 (2020)
DOI Order publishers version
Open Access Green: Postprint online available 12/2021
Proton relaxation in model and real wines is investigated for the first time by fast field cycling NMR relaxometry. The relaxation mechanism unambiguously originates form proton interaction with paramagnetic ions naturally present in wines. Profiles of a white Chardonnay wine from Burgundy, a red Medoc, and model wines are well reproduced by Solomon-Bloembergen-Morgan equations. Relaxation is primarily governed by interactions with Mn2+. A straightforward model-independent quantification of the manganese ion concentration (down to few tens of mu g/L) is proposed.
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Publication type Article: Journal article
Document type Scientific Article
Keywords Ffc Nmr Relaxometry ; Chardonnay Wine ; Paramagnetic Ions ; Manganese; Field-cycling Nmr; Magnetic-relaxation Dispersion; Proton Relaxation; Contrast Agents; Geographical Origin; Paramagnetic-ions; Aqueous-solutions; Trace-elements; H-1 Nmrd; Icp-ms
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