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Supercritical CO2 extraction and products analysis of sweet almond
  
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KeyWord:sweet almond  supercritical CO2 extraction  almond oil  almond powder
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LIU Xiaorui  
DI Zhixing  
SU Xiaojuan，etc  
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Abstract:
      With sweet almond produced from Xinjiang as raw material,the almond oil was extracted by supercritical CO2 technology，the physicochemical indexes and fatty acid composition of almond oil were determined,and the trace elements and amino acid composition of almond powder were analyzed. The results showed that under the conditions of extraction temperature 45℃, extraction pressure 33 MPa, extraction time 5.5 h and separation temperature 48℃, the yield of almond oil was 46.44%; almond oil was rich in oleic acid（70.98%）and linoleic acid (22.93%), and the content of unsaturated fatty acids was up to 93.96%; the almond powder was rich in protein and trace elements with 50.66% of protein,2 655 mg/kg of calcium,3 995 mg/kg of magnesium,127 mg/kg of iron,116.5 mg/kg of zinc and 6.24 mg/kg of manganese; the content of glutamic acid was the highest in protein of almond powder and reached 11.00%.
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