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Fluorescence Spectroscopy Combined with Chemometrics for the Investigation of the Adulteration of Essential Oils

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Abstract

Artificial neural networks (ANNs) were built with excitation-emission matrix fluorescence (EEMF) spectra of essential oils for the investigation of their adulteration. With self-organized maps (SOMs), the clusters formed by all the types of essential oils were visualized. Pure essential oils were globally separated from their adulterated samples. The nature of the adulterant (vegetable oil, essential oil, solvent) in adulterated essential oils was revealed by a multilayer perceptron (MLP) network which classified them with a percentage of correct classification of 92.31%. In the case of the adulteration of neroli essential oil by sunflower vegetable oil, with another multilayer perceptron network, the level of adulteration was globally well evaluated. The correlation coefficient between true and evaluated adulteration percentages was 0.951. The samples corresponding to the adulteration percentage of 5% were the worse evaluated.

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Acknowledgements

The authors gratefully acknowledge support of this work, through NET-45 and OEA-AC-71 projects, by the Abdus Salam International Centre for Theoretical Physics (ICTP, Trieste, Italy). The authors also thank Professor Souad Lahmar for providing the best conditions for the accomplishment of this work.

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Authors and Affiliations

  1. Centre de Physique Atomique Moléculaire et Optique Quantique (CEPAMOQ), Faculty of Science, The University of Douala, P.O. Box 8580, Douala, Cameroon

    William Mbogning Feudjio

  2. Laboratoire de Spectroscopie Atomique Moléculaire et Applications (LSAMA), Faculty of Science, The University of Tunis El Manar, P.O. Box 2092, Tunis, Tunisia

    William Mbogning Feudjio, Hassen Ghalila, Youssef Majdi & Nejmeddine Jaïdane

  3. The University of Maroua, P.O. Box 46, Maroua, Cameroon

    Mama Nsangou

  4. The University of Bangui, P.O. Box 1450, Bangui, Central African Republic

    Yvon Mbesse Kongbonga

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  1. William Mbogning Feudjio
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  2. Hassen Ghalila
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  3. Mama Nsangou
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  4. Youssef Majdi
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  5. Yvon Mbesse Kongbonga
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  6. Nejmeddine Jaïdane
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Correspondence to William Mbogning Feudjio.

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William Mbogning Feudjio declares that he has no conflict of interest. Hassen Ghalila declares that he has no conflict of interest. Mama Nsangou declares that he has no conflict of interest. Youssef Majdi declares that he has no conflict of interest. Yvon Mbesse Kongbonga declares that he has no conflict of interest. Nejmeddine Jaïdane declares that he has no conflict of interest.

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Mbogning Feudjio, W., Ghalila, H., Nsangou, M. et al. Fluorescence Spectroscopy Combined with Chemometrics for the Investigation of the Adulteration of Essential Oils. Food Anal. Methods 10, 2539–2548 (2017). https://doi.org/10.1007/s12161-017-0823-4

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