Prospective exploration of hazelnut's unsaponifiable fraction for geographical and varietal authentication: A comparative study of advanced fingerprinting and untargeted profiling techniques
<p>This study compares two data processing techniques (fingerprinting and untargeted profiling) to authenticate</p><p>hazelnut cultivar and provenance based on its unsaponifiable fraction by GC–MS. PLS-DA classification models</p><p>were developed on a selected sample set (n = 176). As test cases, c...
| Authors: | ; ; ; ; ; ; |
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| Format: | Article |
| Status: | Published version |
| Publication date: | 2023 |
| Country: | España |
| Institution: | Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| Repository: | Recercat. Dipósit de la Recerca de Catalunya |
| OAI Identifier: | oai:recercat.cat:2445/219758 |
| Online Access: | https://hdl.handle.net/2445/219758 |
| Access Level: | Open access |
| Keyword: | Avellanes Química dels aliments Hazelnuts Food composition |
| Summary: | <p>This study compares two data processing techniques (fingerprinting and untargeted profiling) to authenticate</p><p>hazelnut cultivar and provenance based on its unsaponifiable fraction by GC–MS. PLS-DA classification models</p><p>were developed on a selected sample set (n = 176). As test cases, cultivar models were developed for “Tonda di</p><p>Giffoni” vs other cultivars, whereas provenance models were developed for three origins (Chile, Italy or Spain).</p><p>Both fingerprinting and untargeted profiling successfully classified hazelnuts by cultivar or provenance,</p><p>revealing the potential of the unsaponifiable fraction. External validation provided over 90 % correct classification,</p><p>with fingerprinting slightly outperforming. Analysing PLS-DA models’ regression coefficients and</p><p>tentatively identifying compounds corresponding to highly relevant variables showed consistent agreement in</p><p>key discriminant compounds across both approaches. However, fingerprinting in selected ion mode extracted</p><p>slightly more information from chromatographic data, including minor discriminant species. Conversely,</p><p>untargeted profiling acquired in full scan mode, provided pure spectra, facilitating chemical interpretability.</p> |
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