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7908254 
Journal Article 
Effect of evening primrose extracts on oxidative stability of sunflower and rapeseed oils 
Niklova, I; Schmidt, S; Habalova, K; Sekretar, S 
2001 
1 
European Journal of Lipid Science and Technology
ISSN: 1438-7697
EISSN: 1438-9312 
Wiley-VCH Verlag 
103 
5 
299-306 
English 
WOS:000169064400006 
Antioxidative activities of evening primrose seed meal extracts in sunflower and rape-seed oils were compared with that of commercially used antioxidants, namely butylated hydroxytoluene (BHT), ascorbylpalmitate as well as Grindox-118. The study was carried out under Schaal oven conditions at 60 °C and the weight gain was followed up by p-anisidine value measurement following the oxidation. An Oxidograph apparatus monitored the oxidation of oils at 110 °C. Among the examined extracts, the ethyl acetate extract (0.2%), containing only 87 mg/g of total phenolics, exhibited a stronger antioxidant activity than BHT (0.01%) and effectively stabilised both oils. A strong antioxidative effect was also noted for the ethanol-ethyl acetate extract (168 mg/g of total phenolics). The study showed that addition of ethyl acetate and ethanol-ethyl acetate extracts could extend the sunflower and rapeseed oils shelf-life by protecting oils from further decomposition that naturally occurs during thermal treatments. 
natural antioxidants; evening primrose; phenolic compounds; lipid oxidation