A multivariate study of the relationship between fatty acids and volatile flavor components in olive and walnut oils |
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Authors: | Mariela?M?Torres Marcela?L?Martínez Email author" target="_blank">Damián?M?MaestriEmail author |
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Affiliation: | (1) Instituto Multidisciplinario de Biología Vegetal (IMBIV), Consejo Nacional de Investigaciones Científicas y Técinicas-Universidad Nacional de Córdoba (CONICET-UNC), Cátedra de Química Orgánica, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de Córdoba, Av. Vélez Sarsfield 1611, X5016GCA Córdoba, Argentina |
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Abstract: | The relationships between FA and the volatile profiles of olive and walnut oils from Argentina were studied using GC and solid-phase
microextraction coupled with GC-MS. The major volatiles were aldehydes and hydrocarbons, produced mainly through the oxidative
pathways. n-Pentane, nonanal, and 2,4-decadienal were predominant in walnut oils, whereas nonanal, 2-decenal, and 2-undecenal were the
most abundant components in olive oils. A multivariate analysis applied to the chemical data emphasized the differences between
the oils and allowed us to see a pattern of covariation among the FA and the volatile compounds. The main differences between
walnut and olive oils were the presence of larger amounts of short-chain (C5–C6) saturated hydrocarbons and aldehydes in the former and the greater quantities of medium-chain (C7–C11) compounds in olive oil. This can be explained by their different origins, mainly from the linoleic acid in walnut oil or
almost exclusively from the oleic acid in olive oil. |
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Keywords: | Fatty acids multivariate analysis olive oil volatile compounds walnut oil |
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