Potential of indigenous plants seed extracts of Anisophyllea boehmii and Aframomum sanguineum from Burundi to protect against oil oxidation

Potencial de extratos de sementes em plantas indígenas de Anisophyllea boehmii e Aframomum sanguineum do Burundi para a proteção contra a oxidação de óleo

Abstract

The objective of seed extracts from Anisophyllea boehmii and Aframomum sanguineum were to evaluate their ability to stabilize against oxidation of oils exposed to sunlight on one hand and subjected to high temperatures on the other hand. Determination of the peroxide value (PV) showed that the extracts had reduced the oxidation of sunflower oils. After 8 weeks of sunlight exposure, the concentration of 265.45 mg/l of A. boehmii extract showed a PV of 30.78 meq O₂/kg, 67.4 mg/l extract of A. sanguineum had a PV of 42.75 meq O₂/kg while the oils without extracts had a very high PV (125.06 meq O₂/kg). Heating of the oils to 180°C for 8 hours was found, with A. boehmii extract (265.45 mg/l), to have a PV of 29.66 meq O₂/kg, with that of A. sanguineum, while the PV of the oils without extract reached 50.66 meq O₂/kg. In the light of these results, the seeds of A. boehmii and A. sanguineum contain antioxydant compounds, which, once extracted, can be used for many purposes in the food processing, pharmaceutical and cosmetic industries.

Key words:
Anisophyllea boehmii; Aframomum sanguineum; peroxide value; stabilizer