Objective: To evaluate the phenolic profile and antioxidant activity in vitro of peanut
skin extract (PSE) and effect of PSE on characteristics of sheep patties during storage.
Methods: PSE phenolic profile was evaluated in LC–MS analysis and by total phenolic
content, 1,1-diphenyl-2-picrylhydrazyl radical scavenging capacity and ferric reducing/
antioxidant power. Patties elaborated with sheep meat were packaged in modified atmosphere
and storage at (2 ± 1) C. The analyses were performed every 5 days for 20
days on microbial counts, physico-chemical properties, lipid oxidation, protein stability
and sensory characteristics.
Results: The major group of phenolic compounds in PSE was the proanthocyanidins
followed by other flavonoids, which are related to potential phenolic content and antioxidant
activity. The addition of PSE and butyl hydroxytoluene (BHT) reduced the microbial
counts during the storage time, caused reduction on the loss of redness and
sensory properties over time. The lipid and protein oxidation in sheep patties was
effectively inhibited by PSE and BHT.
Conclusions: The present results showed the potential application of PSE as a natural
alternative to replace synthetic antioxidants (BHT) for increasing the quality and
extending the shelf-life of sheep patties.