Seeking a Fast Screening Method of the Varietal Origin of Olive Oil: The Usefulness of an NMR-Based Approach

Maria João Cabrita; Arona Pires; Anthony J Burke; Raquel Garcia

doi:10.3390/foods10020399

Seeking a Fast Screening Method of the Varietal Origin of Olive Oil: The Usefulness of an NMR-Based Approach

Foods. 2021 Feb 11;10(2):399. doi: 10.3390/foods10020399.

Authors

Maria João Cabrita¹, Arona Pires^{2

3}, Anthony J Burke^{2

4}, Raquel Garcia¹

Affiliations

¹ MED-Mediterranean Institute for Agriculture, Environment and Development, Departamento de Fitotecnia, Escola de Ciências e Tecnologia, Universidade de Évora, Pólo da Mitra, Ap. 94, 7006-554 Évora, Portugal.
² Departamento de Química, Escola de Ciências e Tecnologia, Universidade de Évora, Rua Romão Ramalho, 59, 7000-671 Évora, Portugal.
³ Escola Superior Agrária, Instituto Politécnico de Coimbra, Bencanta, 3045-601 Coimbra, Portugal.
⁴ LAQV-REQUIMTE, Universidade de Évora, Rua Romão Ramalho, 59, 7000-671 Évora, Portugal.

Abstract

This work encompasses the use of 1D multinuclear NMR spectroscopy, namely, ¹H NMR and ¹³C NMR DEPT 45, combined with a multivariate statistical analysis to characterize olive oils produced from nine different varieties: Galega Vulgar, Cobrançosa, Cordovil de Serpa, Blanqueta, Madural, Verdeal Alentejana, Arbequina, Picual and Carrasquenha. Thus, the suitability of an NMR-based spectroscopic tool to discriminate olive oils according to their varietal origin is addressed. The results obtained show that the model based on ¹³C NMR DEPT 45 data has a stronger performance than the model based on ¹H NMR data, proving to be promising in the discrimination of the olive oils under study based on their varietal origin, being particularly relevant for olive oils of the Galega Vulgar variety.

Keywords: 13C NMR DEPT 45; 1H NMR; olive oil; varietal origin.

Abstract

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