Korean Journal of Food Science and Technology (한국식품과학회지)

Korean Society of Food Science and Technology (한국식품과학회)
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Volatile Compounds in the Oxidation of Unsaturated Fatty Acids Caused in Off-flavor of Porcine Liver by HS-SPME

Headspace solid-phase microextraction(HS-SPME)를 이용한 간의 비린내불쾌취에 기인하는 불포화지방산 산화생성물의 휘발성성분

  • Im, Sung-Im (Dongeui Food Research Institute, Dongeui University) ;
  • Choi, Sung-Hee (Department of Food Science and Nutrition, Dongeui University)
  • 임성임 (동의대학교 한방식품연구소) ;
  • 최성희 (동의대학교 식품영양학과)
  • Published : 2003.06.01
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Abstract

Headspace solid-phase microextraction(HS-SPME) was used to isolate the off-flavor volatile compounds, which are formed during the oxidation of porcine liver and unsaturated fatty acids in porcine liver induced by iron. Three fibers for HS-SPME method development were tested, and the polydimethylsiloxane/divinylbenzene(PDMS/DVB) fiber was selected as providing the best detection of analyzed compounds. In the oxidized arachidonic acid, the major compounds identified were hexanal, 1-octen-3-one(metallic), (Z)-4-heptenal, (E)-2-octenal, 1-octen-3-ol(mushroom), (Z)-2-nonenal (cardboard-like), and (E,E)-2,4-decadienal(fatty, oily). In the oxidized linolenic acid, the major ones were (E,E)-2,4-heptadienal(fishy), (E,E)-3,5-octadien-2-one and (E,Z)-2,6-nonadienal. Moreover, those of th oxidized porcine liver with iron were hexanal, 1-octen-3-one, (Z)-4-heptenal, (E,Z)-2,4-decadienal and (E,E)-2,4-decadienal. These results showed that the fishy and metallic off-flavor in porcine liver were due to the oxidation of unsaturated fatty acids in porcine liver.

간 및 간에 함유된 불포화지방산인 arachidonic, linolenic, linoleic 및 oleic acid의 철 이온 존재하에서의 headspace 산화 반응생성물을 SPME법을 이용하여 포집, 분석하는 것에 의해 간에 함유된 불포화지방산의 산화생성물과 간의 비린내 불쾌취 형성과의 관련성을 검토하였다. SPME fiber중 불포화지방산의 headspace 산화생성물인 휘발성 알데히드류, 알코올류 및 지방산 등 대다수의 화합물을 검출에는 PDMS/DVB fiber가 적합하였다. 간의 headspace 산화생성물은 arachdonic acid을 비롯한 간에 함유된 각 불포화지방산의 head-space 산화생성물과 일치하였으며, 간의 불쾌취 형성은 간에 함유된 불포화지방산의 산화로 생성되는 산화 반응생성물에 의한 것이 시사되었다. 간의 불쾌취를 형성하는 주요성분으로는, arachidonic acid에서 생성되어 간의 금속취를 형성하는 화합물로 생각되어지는 1-octen-3-one 및 hexanol과 linolenic acid에서 형성되어 간의 비린내를 형성하는 (E,E)-2,4-heptadienal이 그 원인물질인 것으로 사료된다. 산화에 의해 생성된 각 불포화지방산의 산화 반응생성물은 간의 불쾌취인 비린내, 금속취 등을 생성하며, 주로 arachidonic acid 및 linolenic acid의 산화에 의해 생성된 산화 반응생성물에 의한 것으로 밝혀졌다.

Keywords

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