Novel time-domain NMR-based traits for rapid, label-free Olive oils profiling

Olive oil is one of the oldest and essential edible oils in the market. The classification of olive oils (e.g. extra virgin, virgin, refined) is often influenced by factors ranging from its complex inherent physiochemical properties (e.g. fatty acid profiles) to the undisclosed manufacturing process...

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Bibliographic Details
Published in:NPJ science of food 2022-12, Vol.6 (1), p.59-59, Article 59
Main Authors: dos Santos, Vasco Rafael, Goncalves, Victor, Deng, Peishan, Ribeiro, Ana Cristina, Teigao, Mariana Maia, Dias, Bárbara, Mendes Pinto, Inês, Gallo, Juan, Peng, Weng Kung
Format: Article
Language:English
Subjects:
631/45/287/1183
639/166/985
639/766/930/878/1263
706/1143
Chemistry
Chemistry and Materials Science
Chemistry/Food Science
Complexity
Edible oils
Fatty acids
Food Microbiology
Food Science
Fruit trees
Infrared spectra
Infrared spectroscopy
Manufacturing industry
Microenvironments
Near infrared radiation
NMR
Nuclear magnetic resonance
Nutrition
Olive oil
Phenotypic variations
Physiochemistry
Spectrum analysis
Time domain analysis
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Summary:Olive oil is one of the oldest and essential edible oils in the market. The classification of olive oils (e.g. extra virgin, virgin, refined) is often influenced by factors ranging from its complex inherent physiochemical properties (e.g. fatty acid profiles) to the undisclosed manufacturing processes. Therefore, olive oils have been the target of adulteration due to its profitable margin. In this work, we demonstrate that multi-parametric time-domain NMR relaxometry can be used to rapidly (in minutes) identify and classify olive oils in label-free and non-destructive manner. The subtle differences in molecular microenvironment of the olive oils induce substantial changes in the relaxation mechanism in the time-domain NMR regime. We demonstrated that the proposed NMR-relaxation based detection (AUC = 0.95) is far more sensitive and specific than the current gold-standards in the field i.e. near-infrared spectroscopy (AUC = 0.84) and Ultraviolet-visible spectroscopy (AUC = 0.73), respectively. We further show that, albeit the inherent complexity of olive plant natural phenotypic variations, the proposed NMR-relaxation based traits may be a viable mean (AUC = 0.71) in tracing the regions of origin for olive trees, in agreement with their geographical orientation.
ISSN:2396-8370
2396-8370
DOI:10.1038/s41538-022-00173-z