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Dominguez Manzano, JaimeAuthor

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July 12, 2025
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Detection and quantification of extra virgin olive oil adulteration by means of autofluorescence excitation-emission profiles combined with multi-way classification

Publicated to: TALANTA. 178 751-762 - 2018-02-01 178(), DOI: 10.1016/j.talanta.2017.09.095

Authors:

Duran Meras, Isabel; Dominguez Manzano, Jaime; Airado Rodriguez, Diego; Munoz de la Pena, Arsenio
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Affiliations

Univ Extremadura, Dept Analyt Chem, Badajoz 06006, Spain - Author
Univ Extremadura, Dept Sci & Math Educ, Badajoz 06006, Spain - Author
Univ Extremadura, Res Inst Water Climate Change & Sustainabil IACYS, Badajoz 06006, Spain - Author
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Abstract

Within olive oils, extra virgin olive oil is the highest quality and, in consequence, the most expensive one. Because of that, it is common that some merchants attempt to take economic advantage by mixing it up with other less expensive oils, like olive oil or olive pomace oil. In consequence, the characterization and authentication of extra virgin olive oils is a subject of great interest, both for industry and consumers. This paper reports the potential of front-face total fluorescence spectroscopy combined with second-order chemometric methods for the detection of extra virgin olive oils adulteration with other olive oils. Excitation-emission matrices (EEMs) of extra virgin olive oils and extra virgin olive oils adulterated with olive oils or with olive pomace oils were recorded using front-face fluorescence spectroscopy. The full information content in these fluorescence images was analyzed with the aid of unsupervised parallel factor analysis (PARAFAC), PARAFAC supervised by linear discriminant analysis (LDA-PARAFAC), and discriminant unfolded partial least-squares (DA-UPLS). The discriminant ability of LDA-PARAFAC was studied through the tridimensional plots of the canonical vectors, defining a surface separating the established categories. For DA-UPLS, the discriminant ability was established through the bidimensional plots of predicted values of calibration and validation samples, in order to assign each sample to a given class. The models demonstrated the possibility of detecting adulterations of extra virgin olive oils with percentages of around 15% and 3% of olive and olive pomace oils, respectively. Also, UPLS regression was used to quantify the adulteration level of extra virgin olive oils with olive oils or with olive pomace oils.
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Keywords

3-way methodAdulterationChemometric analysisChemometric discriminatioExploratory analysisFront-face fluorescenceOlive oilsPartial least-squaresPattern-recognitionProtected denominationRaman-spectroscopySynchronous fluorescence spectroscopyTandem mass-spectrometryVegetable-oils

Quality index

Bibliometric impact. Analysis of the contribution and dissemination channel

The work has been published in the journal TALANTA due to its progression and the good impact it has achieved in recent years, according to the agency WoS (JCR), it has become a reference in its field. In the year of publication of the work, 2018, it was in position 11/84, thus managing to position itself as a Q1 (Primer Cuartil), in the category Chemistry, Analytical.

From a relative perspective, and based on the normalized impact indicator calculated from World Citations provided by WoS (ESI, Clarivate), it yields a value for the citation normalization relative to the expected citation rate of: 2.62. This indicates that, compared to works in the same discipline and in the same year of publication, it ranks as a work cited above average. (source consulted: ESI Nov 13, 2025)

Specifically, and according to different indexing agencies, this work has accumulated citations as of 2026-04-02, the following number of citations:

  • WoS: 67
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Impact and social visibility

From the perspective of influence or social adoption, and based on metrics associated with mentions and interactions provided by agencies specializing in calculating the so-called "Alternative or Social Metrics," we can highlight as of 2026-04-02:

  • The use of this contribution in bookmarks, code forks, additions to favorite lists for recurrent reading, as well as general views, indicates that someone is using the publication as a basis for their current work. This may be a notable indicator of future more formal and academic citations. This claim is supported by the result of the "Capture" indicator, which yields a total of: 104 (PlumX).
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Awards linked to the item

The authors are grateful to Ministerio de Economia, Industria y Competitividad of Spain (Project CTQ2017-82496-P) and Gobierno de Extremadura (GR15090-Research Group FQM003, and IB16058 and IB16022), all co-financed by European FEDER funds, for financially supporting this work.
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