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| Optimization of bleaching process of idesia oil by response surface methodologypartitioning for extraction of Borago officinalis seed oil |
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| KeyWord:idesia oil bleaching activated clay response surface methodology |
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| Abstract: |
| The idesia oil was refined by degumming, deacidification and bleaching. The effect of decolorizer type on bleaching rate was investigated. With bleaching rate as an index and activated clay (preferred bleaching agent) dosage, bleaching temperature and bleaching time as factors, the bleaching process of idesia oil was optimized by response surface methodology. The physicochemical indexes and fatty acid composition of the idesia oil before and after refining were determined. The results showed that the optimal bleaching conditions were obtained as follows: activated clay (preferred bleaching agent) dosage 17%, bleaching temperature 94?℃ and bleaching time 94 min. Under these conditions, the bleaching rate of idesia oil was (91.07±0.43)%. After refining, the quality of idesia oil was improved significantly, and the fatty acid composition and content of idesia oil remained the same with linoleic acid content of 73.46%. |
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