Effect of malaxation temperature on the physicochemical and sensory quality of cv. Cobrancosa olive oil and its evaluation using an electronic tongue

• Type: Article in International Scientific Journal
• Date: 2021

Authors

Marx, IMG (Author) Other; Rodrigues, N (Author) Other; Veloso, ACA (Author) Other; Susana Casal (Author) FFUP; Pereira, JA (Author) Other; Peres, AM (Author) Other

Journal

Title: LWT - Food Science and Technology

Vol. 137

ISSN: 0023-6438

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 23 Citations

Scopus - 28 Citations

Other information

Authenticus ID: P-00T-0SR

DOI: 10.1016/j.lwt.2020.110426

Abstract (EN): Olive oil is consumed worldwide due to its appreciated sensory attributes and health benefits, which are related with its fatty acid profile and richness in phenolic compounds that support a health claim concerning olive oil protective effects on blood lipids. However, to ensure that oils possess a rich phenolic content, the extraction conditions can be optimised. Therefore, the effects of malaxation temperature (22, 28 and 34 degrees C) on the physicochemical and sensory characteristics of cv. Cobrancosa olive oils were evaluated. The oils extracted at 22 degrees C had an overall better physicochemical quality (higher total phenols content, greater oxidative stability, lower free acidity and oxidation markers) and more intense positive sensory sensations (higher bitterness and pungency). Additionally, this study showed that a potentiometric electronic tongue could be used to discriminate oils taking into account the effect of malaxation temperature on the overall physicochemical and sensory scores (all samples correctly classified for leave-one-out cross-validation) with a predictive classification similar to that achieved by trained panellists. This finding strengthens the hypothesis that this device could be used as a complementary/alternative taste tool for assessing the impact of the extraction conditions on the oils' physicochemical and sensory characteristics.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9