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Comparison of Fatty Acid Composition by Fat Extraction Method: Different Parts of Chicken by Cooking Method

조지방 추출 방법에 따른 지방산 조성 비교 및 조리방법을 달리한 닭고기 부위별 지방산 함량 분석

  • Jeong, Sang Hwa (Department of Food Science and Technology, Chungnam National University) ;
  • Shin, Jung Ah (Department of Food Science and Technology, Chungnam National University) ;
  • Kim, In Hwan (Department of Food and Nutrition, Korea University) ;
  • Kim, Byung Hee (Department of Food Science and Technology, Chungang University) ;
  • Lee, Jun Soo (Department of Food Science and Technology, Chungbuk National University) ;
  • Lee, Ki Teak (Department of Food Science and Technology, Chungnam National University)
  • Received : 2014.04.21
  • Accepted : 2014.07.08
  • Published : 2014.08.31

Abstract

Different fat extraction methods such as the Rose-Gottlieb, Folch, and hydrolytic methods were compared in terms of their fatty acid contents of milk powder. Contents of total saturated fatty acids by the Rose-Gottlieb, Folch, and hydrolytic methods were 8.578, 8.302, and 8.711 g/100 g milk powder while contents of total unsaturated fatty acids by the Rose-Gottlieb, Folch, and hydrolytic methods were 11.513, 11.143, and 11.669 g/100 g milk powder, respectively. These results suggest that the hydrolytic method has a similar fatty acid composition as the well-known Rose-Gottlieb method. In uncooked chicken, total fatty acid contents of breast, gamb, and wing were 6.302, 8.313, and 11.346 g/100 g, respectively. Among different cooking methods, frying increased content of total trans fatty acids up to 0.034 (breast), 0.112 (gamb), and 0.123 g/100 g (wing).

본 연구에서는 분유(milk powder)를 이용하여 조지방 추출방법인 Rose-Gottlieb법, Folch법 그리고 산분해법으로 각 방법의 총 포화지방산, 불포화지방산, 트랜스지방산의 함량을 비교하였고, 산분해법을 이용하여 조리방법에 따른 닭의 부위별 지방산 조성을 확인하였다. 각 조지방 추출법(Rose-Gottlieb법, Folch법, 산분해법)으로 추출된 포화지방산 함량은 8.302~8.711 g/100 g milk powder로 유의적 차이를 보이지 않았으며, 불포화지방산 함량(11.143~11.669 g/100 g milk powder)과 트랜스지방산 함량(0.269~0.284 g/100 g milk powder)도 유의적인 차이가 나타나지 않았다. 각 추출법에 의한 지방산 조성과 함량을 비교해본 결과, 산분해법이 시간, 조건, 조작 등에서 용이하였다. 또한 산분해법을 통하여 FAPAS의 지방산 함량을 분석해본 결과, z-score가 ${\mid}z{\mid}{\leq}2$를 만족하여 신뢰성을 검증할 수 있었다. 원재료의 경우 날개살(11.346 g/100 g sample), 다리살(8.313 g/100 g sample), 가슴살(6.302 g/100 g sample)순의 총 지방산 함량을 가졌으며, 조리방법에 따른 닭의 부위별 지방산 조성 분석 결과 볶기와 튀기기 조리방법에서 트랜스지방산의 함량이 더 검출되는 것을 확인할 수 있었다.

Keywords

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