Influence of household conditions on the shelf-life and polyphenolic-related health claim of Cobrançosa extra virgin olive oil

• Tipo: Artigo em Revista Científica Internacional
• Data: 2025

Autores

Alimi, S (Autor) Outra; Rodrigues, N (Autor) Outra; Veloso, ACA (Autor) Outra; Cruz, R (Autor) Outra; Khemakhem, M (Autor) Outra; Pereira, JA (Autor) Outra; Susana Casal (Autor) FFUP; Peres, AM (Autor) Outra

Revista

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Título: EUROPEAN FOOD RESEARCH AND TECHNOLOGY

ISSN: 1438-2377

Indexação

ISI Web of Knowledge - 0 Citações

Scopus - 0 Citações

Outras Informações

ID Authenticus: P-018-RPA

DOI: 10.1007/s00217-025-04743-9

Abstract (EN): This study examines how typical household conditions after bottle opening affect the physicochemical, sensory, and bioactive properties of cv. Cobran & ccedil;osa extra virgin olive oil (EVOO), attempting to define kinetic models to predict the shelf-life (SL) during domestic use. For 9 weeks, EVOO amber glass bottles (750 mL), exposed to light (n = 5) or darkness (n = 5), at 18 +/- 2 degrees C, were opened/shaken daily to simulate household use, with oil removed weekly. In light-exposed samples, the peroxide value (PV) imposed EVOO declassification at week five, with intense rancidity at week eight (>= 3.5), rendering the oil unsuitable for consumption. On the contrary, light-protected oils had only a downgrade to virgin olive oil due to a K232 rise. Acidity was preserved, as was the health claim supported by tyrosol/hydroxytyrosol polyphenols. Kinetic models (zero-, first-, and second-order) supported on the oxidation indicators (PV, K232, or K268), allowed determining reaction rates by linear regression (correlation coefficients: 0.942 to 0.997). For light-exposed oils, PV was the most reliable indicator of SL, predicting from a second-order TRUL model a preservation of the EVOO grade for 35 +/- 2 days, in agreement with the experimental SL (28-35 days). For light-protected oils, K232 was the most accurate SL indicator, predicting a SL of 49 +/- 4 days using a zero-order TRUL model, consistent with the experimental SL (49-56 days). The models were validated using SL literature data from cvs. Arbequina, Istarska Bjelica, and Bu & zcaron;a olive oils, confirming their applicability to various cultivars and highlighting oxidation's role, particularly photo-oxidation, in EVOO degradation during domestic use.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 16