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| Technology of reducing acid value of Antarctic krill oil |
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| DOI：10.19902/j.cnki.zgyz.1003-7969.230682 |
| KeyWord:Antarctic krill oil magnesium silicate acid value phospholipid content fluidity transparency oil yield |
| FundProject:辽宁省“兴辽英才计划”项目（XLYC2007108） |
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| Abstract: |
| In order to provide technical reference for improving the quality of Antarctic krill oil, using Antarctic krill oil as the raw material and food-grade magnesium silicate as the deacidification agent, the oil was subjected to deacidification treatment. The most critical five indicators (yield of Antarctic krill oil, phospholipid content, acid value, fluidity and transparency）for assessing the production cost and product quality of Antarctic krill oil were used as indicators, and the optimal deacidification process conditions were determined through single factor experiments and orthogonal experiments. The results showed that the optimal deacidification process conditions were as follows: mass-volume ratio of Antarctic krill oil to ethanol 1∶ 1, magnesium silicate addition amount 15% (based on the mass of Antarctic krill oil), and reaction time 1 h. Under the optimal conditions, the yield of deacidfied Antarctic krill oil reached 92.5%, the acid value was reduced from 11.53 mgKOH/g to 5.74 mgKOH/g, the phospholipid content decreased from 53.36% to 52.33%, and both fluidity and transparency were improved. In conclusion, the magnesium silicate deacidification process can effectively reduce the acid value while retain its nutritional component phospholipid in Antarctic krill oil. |
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