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Article

Multi-Element Analysis of Sicilian Citrus Fruits from Volcanic and Non-Volcanic Areas for Geographical Authentication and Food Safety Assessment

by
Giuseppa Di Bella
1,
Vincenzo Nava
1,
Angela Giorgia Potortì
1,*,
Roberto Sturniolo
1,2 and
Vincenzo Lo Turco
1
1
Department of Biomedical and Dental Sciences and of Morphological and Functional Images (BIOMORF), University of Messina, Viale Palatucci 13, 98168 Messina, Italy
2
Department of Chemical, Biological, Pharmaceutical, and Environmental Sciences (CHIBIOFARAM), University of Messina, Viale F. Stagno d’Alcontres 31, 98166 Messina, Italy
*
Author to whom correspondence should be addressed.
Foods 2026, 15(17), 3008; https://doi.org/10.3390/foods15173008
Submission received: 17 July 2026 / Revised: 20 August 2026 / Accepted: 24 August 2026 / Published: 26 August 2026
(This article belongs to the Section Food Quality and Safety)

Abstract

This study investigated the elemental composition along the soil–plant continuum of Sicilian citrus fruits grown in volcanic (Stromboli and Etna) and non-volcanic (Marsala) areas. Following microwave-assisted acid digestion, macro- and trace elements were quantified via ICP-MS in soils, whole fruits, peel, pulp, and juice. Citrus fruits from volcanic areas generally showed higher concentrations of K, P, Fe, and Al than those from Marsala. Potentially toxic elements in edible fractions were generally low, with Pb and Cd below the applicable regulatory limits. Elemental partitioning showed higher measured concentrations of several potentially toxic elements in the peel, with lower concentrations in pulp and juice. Principal Component Analysis (PCA) revealed separation of samples according to geographical origin, while Linear Discriminant Analysis (LDA) achieved complete classification within the investigated dataset, with K, Al, Mg, and Ni. These findings indicate that elemental fingerprinting may support geographical characterization, together with nutritional and toxicological assessment.
Keywords: citrus fruits; elemental fingerprint; volcanic soils; geographical characterization; food safety; chemometrics citrus fruits; elemental fingerprint; volcanic soils; geographical characterization; food safety; chemometrics

Share and Cite

MDPI and ACS Style

Di Bella, G.; Nava, V.; Potortì, A.G.; Sturniolo, R.; Lo Turco, V. Multi-Element Analysis of Sicilian Citrus Fruits from Volcanic and Non-Volcanic Areas for Geographical Authentication and Food Safety Assessment. Foods 2026, 15, 3008. https://doi.org/10.3390/foods15173008

AMA Style

Di Bella G, Nava V, Potortì AG, Sturniolo R, Lo Turco V. Multi-Element Analysis of Sicilian Citrus Fruits from Volcanic and Non-Volcanic Areas for Geographical Authentication and Food Safety Assessment. Foods. 2026; 15(17):3008. https://doi.org/10.3390/foods15173008

Chicago/Turabian Style

Di Bella, Giuseppa, Vincenzo Nava, Angela Giorgia Potortì, Roberto Sturniolo, and Vincenzo Lo Turco. 2026. "Multi-Element Analysis of Sicilian Citrus Fruits from Volcanic and Non-Volcanic Areas for Geographical Authentication and Food Safety Assessment" Foods 15, no. 17: 3008. https://doi.org/10.3390/foods15173008

APA Style

Di Bella, G., Nava, V., Potortì, A. G., Sturniolo, R., & Lo Turco, V. (2026). Multi-Element Analysis of Sicilian Citrus Fruits from Volcanic and Non-Volcanic Areas for Geographical Authentication and Food Safety Assessment. Foods, 15(17), 3008. https://doi.org/10.3390/foods15173008

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