Fast Identification of Food Thickeners by Nontargeted NMR-Spectroscopy

Food thickeners are carbohydrate additives that can only be determined by long-term, multistep analysis. Fast methods to directly determine thickeners in food matrixes are therefore welcome. In this study, a rapid procedure based on the direct 1H NMR analysis of food samples dissolved in deuterated...

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Bibliographic Details
Published in:Journal of agricultural and food chemistry 2021-03, Vol.69 (12), p.3761-3775
Main Authors: Radziej, Sandra, Scherb-Forster, Julia, Schlicht, Claus, Eisenreich, Wolfgang
Format: Article
Language:English
Subjects:
Animals
Carrageenan
Food Additives
Gum Arabic
Magnetic Resonance Spectroscopy
New Analytical Methods
Pectins
Plant Gums
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Summary:Food thickeners are carbohydrate additives that can only be determined by long-term, multistep analysis. Fast methods to directly determine thickeners in food matrixes are therefore welcome. In this study, a rapid procedure based on the direct 1H NMR analysis of food samples dissolved in deuterated water was developed. Individual thickeners were assigned due to specific marker signals gleaned from two-dimensional NMR analyses. The combination of one-dimensional 1H NMR and DOSY experiments enabled unequivocal assignments of thickeners even in complex matrixes. Using this approach, gum arabic, carrageenan, agar–agar, galactomannans, and pectin could be identified in pastille, glaze, and fruit spread. Because of low concentrations (
ISSN:0021-8561
1520-5118
DOI:10.1021/acs.jafc.0c07760