title: 1H NMR-based protocol for the detection of adulterations of refined olive oil with refined hazelnut oil.
abstract: A (1)H NMR analytical protocol for the detection of refined hazelnut oils in admixtures with refined olive oils is reported according to ISO format. The main purpose of this research activity is to suggest a novel analytical methodology easily usable by operators with a basic knowledge of NMR spectroscopy. The protocol, developed on 92 oil samples of different origins within the European MEDEO project, is based on (1)H NMR measurements combined with a suitable statistical analysis. It was developed using a 600 MHz instrument and was tested by two independent laboratories on 600 MHz spectrometers, allowing detection down to 10% adulteration of olive oils with refined hazelnut oils. Finally, the potential and limitations of the protocol applied on spectrometers operating at different magnetic fields, that is, at the proton frequencies of 500 and 400 MHz, were investigated.
authors.affiliation: Department of S.T.A.A.M., University of Molise, I-86100 Campobasso, Italy. mannina@unimol.it
authors.forename: Luisa
authors.initials: L
authors.lastname: Mannina
authors.forename: Marco
authors.initials: M
authors.lastname: D'Imperio
authors.forename: Donatella
authors.initials: D
authors.lastname: Capitani
authors.forename: Serge
authors.initials: S
authors.lastname: Rezzi
authors.forename: Claude
authors.initials: C
authors.lastname: Guillou
authors.forename: Thomas
authors.initials: T
authors.lastname: Mavromoustakos
authors.forename: María Dolores Molero
authors.initials: MD
authors.lastname: Vilchez
authors.forename: Antonio Herrera
authors.initials: AH
authors.lastname: Fernández
authors.forename: Freddy
authors.initials: F
authors.lastname: Thomas
authors.forename: Ramon
authors.initials: R
authors.lastname: Aparicio
mesh_terms: D031211:Corylus / Q000737:chemistry*; D004042:Dietary Fats, Unsaturated / Q000032:analysis; D005506:Food Contamination; D005524:Food Technology / Q000379:methods* / Q000592:standards; D005638:Fruit / Q000737:chemistry; D057230:Limit of Detection; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D015233:Models, Statistical; D009754:Nuts / Q000737:chemistry; D031658:Olea / Q000737:chemistry*; D000069463:Olive Oil; D010938:Plant Oils / Q000737:chemistry*; D015203:Reproducibility of Results
chemical_list: D004042:Dietary Fats, Unsaturated; D000069463:Olive Oil; D010938:Plant Oils