Quantification of manganous ions in wine by NMR relaxometry

被引：15

作者：

Bodart, Philippe R. ^{[1
,2
]}

Rachocki, Adam ^{[3
]}

Tritt-Goc, Jadwiga ^{[3
]}

Michalke, Bernhard ^{[4
]}

Schmitt-Kopplin, Philippe ^{[4
,5
]}

Karbowiak, Thomas ^{[1
]}

Gougeon, Regis D. ^{[1
]}

机构：

[1] Univ Bourgogne Franche Comte, AgroSup Dijon, UMR PAM A02 102, 1 Esplanade Erasme, F-21000 Dijon, France

[2] Univ Sci & Technol Lille, IUT A, F-59655 Villeneuve Dascq, France

[3] Polish Acad Sci, Inst Mol Phys, M Smoluchowskiego 17, PL-60179 Poznan, Poland

[4] Helmholtz Zentrum Munchen, Res Unit Analyt BioGeoChem, Ingolstaedter Landstr 1, D-85764 Neuherberg, Germany

[5] Tech Univ Munich, Chair Analyt Food Chem, Alte Akad 10, D-85354 Freising Weihenstephan, Germany

来源：

TALANTA | 2020年 / 209卷

关键词：

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;

D O I：

10.1016/j.talanta.2019.120561

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

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.

引用

页数：9

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