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海豹油n-3PUFA富集过程中品质及挥发性物质的变化
引用本文:郑振霄,戴志远,彭茜,. 海豹油n-3PUFA富集过程中品质及挥发性物质的变化[J]. 中国食品学报, 2021, 21(1): 334-340
作者姓名:郑振霄  戴志远  彭茜  
作者单位:浙江工商大学海洋食品研究院;浙江工商大学浙江省水产品加工技术研究联合重点实验室;浙江工商大学海洋食品精深加工关键技术省部共建协同创新中心;
基金项目:国家重点研发计划课题(2018YFC0311204)
摘    要:以海豹油乙酯为原料,采用尿包法和分子蒸馏法对其中的n-3PUFA进行富集,通过理化分析、气相色谱(GC)及顶空固相微萃取-气-质谱联用(HS-SPME-GC-MS)等技术研究富集过程中样品品质、脂肪酸组成和挥发性物质的变化.结果表明:尿包法和分子蒸馏法可以显著提高样品的皂化值和碘值,对酸价和过氧化物值影响不大.尿包法可...

关 键 词:海豹油  尿素包合  分子蒸馏  品质变化  挥发性物质

The Changes of Quality and Volatile Substance of the Seal Oil during the n-3PUFA Enrichment Processing
Zheng Zhenxiao,Dai Zhiyuan,Peng Xi. The Changes of Quality and Volatile Substance of the Seal Oil during the n-3PUFA Enrichment Processing[J]. Journal of Chinese Institute of Food Science and Technology, 2021, 21(1): 334-340
Authors:Zheng Zhenxiao  Dai Zhiyuan  Peng Xi
Affiliation:(Institute of Sea Food,Zhejiang Gongshang University,Hangzhou 310012;State Key Laboratory of Aquatic Products Processing of Zhejiang Province,Zhejiang Gongshang University,Hangzhou 310012;Collaborative Innovation Center of Seafood Deep Processing,Zhejiang Gongshang University,Hangzhou 310012)
Abstract:The n-3PUFA in the seal oil ethyl ester was enriched by urea adduction and molecular distillation.The physicochemical index,fatty acid composition and volatile substance in the seal oil during the enrichment were analyzed by physicochemical analysis,GC and HS-SPME-GC-MS.The results showed that the saponification value and iodine value were significantly improved by urea adduction and molecular distillation while had no significant effect on the acid value and peroxide value.The content of SFA was significantly decreased after urea adduction while n-3PUFA present the opposite tendency.There was a significant decrease in the content of MUFA.However,some long chain MUFA(C16:1,C18:1 and C20:1)still occupied larger percentage.The SFA and MUFA were separated effectively after molecular distillation and products with n-3PUFA content of 92.96%were obtained.There was no significant difference in the quantity of volatile substances between the material,urea adduction sample and molecular sample.The content of volatile substances in the urea adduction sample was significantly higher than the material and the material was significantly higher than that of the molecular distillation sample.The main volatile substances that contribute to the change were ethanol,2-ethyl hexanol,fifteen carbon enol,nonanal,undecanal,3,5-octadien-2-one,2-nonanone,2-heptanone.
Keywords:seal oil  urea adduction  molecular distillation  quality changes  volatile substance
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