尿素包合法富集苦瓜籽油中α-桐酸的工艺优化
Enrichment of α-eleostearic acid from bitter gourd seed oil by urea adduction fractionation
  
DOI:
中文关键词:  苦瓜籽油  共轭亚麻酸  α-桐酸  尿素包合法  富集纯化
英文关键词:bitter gourd seed oil  conjugated linolenic acid  α-eleostearic acid  urea adduction fractionation  enrichment and purification
基金项目:湖北省果蔬精深加工及营养功能食品开发企校联合创新中心(whpu-2020-kj-304)
Author NameAffiliation
SHUAI Xiaoyan .Modern Industry School of Selenium Science and Engineering, Wuhan Polytechnic University, Wuhan 430023, China 
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中文摘要:
      以超临界CO2萃取的苦瓜籽油为原料,经皂化酸解法制得混合脂肪酸,再采用尿素包合法富集其中的α-桐酸。在单因素试验的基础上,采用正交试验对富集工艺条件进行优化。结果表明,α-桐酸的最佳富集工艺条件为:采用95%乙醇作为尿素溶剂,混合脂肪酸与尿素质量比1∶ 3,尿素与95%乙醇质量比1∶ 5,包合温度4 ℃,包合时间24 h。在最佳工艺条件下,α-桐酸纯度从苦瓜籽油中的28.83%提高至60.03%,产物中共轭亚麻酸相对含量达到71.28%。
英文摘要:
      Using bitter gourd seed oil extracted by supercritical CO2 as raw material, the mixed fatty acid was obtained by saponification and acid hydrolysis, and then the α-eleostearic acid was enriched by urea adduction fractionation. Based on single factor experiment, the enrichment conditions were optimized by orthogonal experiment. The results showed that the optimal process for enriching α- eleostearic acid from bitter gourd seed oil were obtained as follows: with 95% ethanol as urea solvent, mass ratio of mixed fatty acid to urea 1∶ 3, mass ratio of urea to 95% ethanol 1∶ 5, adduction temperature 4 ℃ and adduction time 24 h. Under these conditions, the purity of α- eleostearic acid increased from 2883% (in bitter gourd seed oil ) to 60.03%, the total relative content of conjugated linolenic acid in the product reached 71.28%.
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