Abstract
Organic products or products with a protected designation of origin (PDO) are vulnerable to fraud; therefore, new and cheaper analytical tools are needed to authenticate them. This work aimed to evaluate the feasibility of using a low-cost and easy-to-use near-infrared (NIR) spectrometer to discriminate agronomic practices and the geographic origin of tomatoes and sweet peppers from different Brazilian regions. Different chemometric approaches were applied, such as principal components analysis (PCA), data driven-soft independent modeling of class analogy (DD-SIMCA), and partial least squares-discriminant analysis (PLS-DA). PCA did not allow clear differentiation between the classes, while the PLS-DA showed excellent classification, with prediction accuracy between 61.9 and 100%. Furthermore, the DD-SIMCA proved to be a good tool for verifying the authenticity of organic tomatoes and sweet peppers, with an accuracy of over 82.7%. These results suggest that the NIR technique combined with chemometrics can be an excellent technique to verify the authenticity of tomatoes and sweet peppers according to the agronomic mode of production and the geographical origin of products by the non-volatile profile using equipment that can be easily set up and acquired at a lower cost.
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The authors declare that all other data supporting the fndings of this study are available within the article and its supplementary information files.
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Acknowledgements
The authors are thankful to the Laboratório de Aplicações de Raios X from UEL for the support in the measurements and to Professor Mário Henrique M. Killner – UEL for assisting with the NIR analyses.
Funding
The current study was funded by the Fundação de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ) Brazil—grant number [E-26/200.891/2021, E-26/200.721/2021, and E-26/200.358/2021], Federal University of Mato Grosso do Sul (UFMS)/Fundação de Apoio ao Desenvolvimento do Ensino, Ciência, e Tecnologia de Mato Grosso do Sul (Fundect/MS)—grant number [23104.016018/2022–84], the Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)—grant number [313119/2020–1, 163480/2020–6, 312595/2021–2, and 310446/2020–1], INCT-FNA [464898/2014–5], and the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Brazil–Finance Code001.
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Jelmir Craveiro de Andrade: conceptualization, investigation, data curation, methodology, software, writing—original draft, visualization, writing—review and editing. Diego Galvan: investigation, data curation, methodology, writing—original draft, visualization, writing—review and editing. Luciane Effting: conceptualization, data curation, methodology, visualization, writing—review and editing. Carini Aparecida Lelis: writing—original draft, visualization, writing—review and editing. Fábio Luiz Melquiades: investigation, data curation, methodology, software, visualization, writing—review and editing, supervision, writing, writing—review and editing. Evandro Bona: investigation, data curation, methodology, software, visualization, writing—review and editing, supervision, writing, writing—review and editing. Carlos Adam Conte-Junior: funding acquisition, project administration, visualization, supervision, writing—review and editing.
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Jelmir Craveiro de Andrade declares that he has no conflict of interest. Diego Galvan declares that he has no conflict of interest. Luciane Effting declares that she has no conflict of interest. Carini Aparecida Lelis declares that she has no conflict of interest. Fábio Melquiades declares that he has no conflict of interest. Evandro Bona declares that he has no conflict of interest. Carlos Adam Conte Junior declares that he has no conflict of interest.
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de Andrade, J.C., Galvan, D., Effting, L. et al. An Easy-to-Use and Cheap Analytical Approach Based on NIR and Chemometrics for Tomato and Sweet Pepper Authentication by Non-volatile Profile. Food Anal. Methods 16, 567–580 (2023). https://doi.org/10.1007/s12161-022-02439-4
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DOI: https://doi.org/10.1007/s12161-022-02439-4