| Title: | Exploring the volatile metabolome of conventional and organic walnut oils by solid-phase microextraction and analysis by GC-MS combined with chemometrics |
| Author(s): | Kalogiouri NP; Manousi N; Rosenberg E; Zachariadis GA; Paraskevopoulou A; Samanidou V; |
| Address: | "Laboratory of Analytical Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, Greece. Laboratory of Analytical Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, Greece. Electronic address: nmanousi@chem.auth.gr. Institute of Chemical Technologies and Analytics, Vienna University of Technology, 1060 Vienna, Austria. Electronic address: egon.rosenberg@tuwien.ac.at. Laboratory of Food Chemistry and Technology, Department of Chemistry, Aristotle University of Thessaloniki, Greece. Electronic address: adparask@chem.auth.gr. Laboratory of Analytical Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, Greece. Electronic address: samanidu@chem.auth.gr" |
| DOI: | 10.1016/j.foodchem.2021.130331 |
| ISSN/ISBN: | 1873-7072 (Electronic) 0308-8146 (Linking) |
| Abstract: | "It is challenging to establish a correlation between the agronomical practices and the volatile profile of high-value agricultural products. In this study, the volatile metabolome of walnut oils from conventional and organic farming type was explored by HS-SPME-GC-MS. The SPME protocol was optimized after evaluating the effects of extraction time, extraction temperature, and sample mass. The optimum parameters involved the extraction of 0.500 g walnut oil at 40 degrees C within 60 min. Twenty Greek walnut oils produced with conventional and organic farming were analyzed and 41 volatile compounds were identified. The determined compounds were semi-quantified, and further processed with chemometrics. Agglomerative hierarchical clustering (AHC) and principal component analysis (PCA) were used. A robust classification model was developed using sparse partial least squares-discriminant analysis (sPLS-DA) for the discrimination of walnut oils into conventional and organic, establishing volatile markers that could be used to guarantee the type of farming" |
| Keywords: | "Gas Chromatography-Mass Spectrometry *Juglans Metabolome Plant Oils Solid Phase Microextraction *Volatile Organic Compounds/analysis Gc-ms Organic farming Spme Walnut oils sPLS-DA, authenticity;" |
| Notes: | "MedlineKalogiouri, Natasa P Manousi, Natalia Rosenberg, Erwin Zachariadis, George A Paraskevopoulou, Adamantini Samanidou, Victoria eng England 2021/06/18 Food Chem. 2021 Nov 30; 363:130331. doi: 10.1016/j.foodchem.2021.130331. Epub 2021 Jun 9" |
