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

• Type: Article in International Scientific Journal
• Date: 2025

Authors

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

Journal

The Journal is awaiting validation by the Administrative Services.

Title: EUROPEAN FOOD RESEARCH AND TECHNOLOGY

ISSN: 1438-2377

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ISI Web of Knowledge - 0 Citations

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Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 16