팜유로 튀긴 유과의 저장 중 품질 변화

Quality Characteristics of Yukwa Fried with Palm Oil during Storage

  • 이유석 (전남대학교 식품공학과 및 농업과학기술연구소) ;
  • 정해옥 (초당대학교 조리과학부) ;
  • 이종욱 (전남대학교 식품공학과 및 농업과학기술연구소)
  • 발행 : 2003.02.01

초록

콩기름과 팜유로 튀긴 유과를 2$0^{\circ}C$와 5$0^{\circ}C$에 저장하면서 분석한 결과 콩기름으로 튀겨 5$0^{\circ}C$에 저장한 유과의 산가는 2주에는 0.78mg/g에서 4주에 9.35mg/g으로 급격한 증가를 하였으나 팜유로 튀긴 유과는 저장 6주까지 변화가 없다가 저장 8주에서 2.08mg/g을 나타내었다. 과산화물가의 경우 콩기름으로 튀긴 유과를 5$0^{\circ}C$에서 저장하였을 때 저장 4주까지 급격한 증가를 보이다 4주 이후 감소하였다. 저장 기간에 따른 지방산의 변화는 2$0^{\circ}C$ 저장의 경우 저장 전과 큰 차이를 보이지 않았지만 5$0^{\circ}C$ 저장의 경우 콩기름과 팜유 모두 palmitic acid, stearic acid 및 oleic acid는 저장기간이 경과함에 따라 증가하였고 linoleic acid와 linolenic acid는 감소하였다. 또한 관능검사 결과 콩기름으로 튀긴 유과는 4주 이후 이취미가 발생하기 시작하여, 7주가 지난 후에는 이취미가 보다 강하게 발생하였지만 팜유로 튀긴 유과는 4주째에 이취미가 약간 발생하였으나, 그정도가 미미하였고, 8주째에도 이취미가 강하게 발생하지 않았다. 따라서 유과 튀김시 콩기름을 팜유로 대체한다면 종래 방법으로 제조된 유과에 비해 저장 기간이 증가할 것으로 사료된다.

Yukwa is a popular Korean traditional fried rice snack. The high fat content and porous structure of Yukwa cause it to become rancid rapidly. For extending the shelf-life of Yukwa, the Bandegi was fried with palm oil and soybean oil. The stability of Yukwa in lipid oxidation was determined by acid value(AV), peroxide value(POV), composition of fatty acid and sensory evaluation during 8 weeks of storage at 20$^{\circ}C$ and 50$^{\circ}C$ As the storage time increased, the AVs of soybean oil and palm oil during storage at 50$^{\circ}C$ were increased up to 42.64 and 2.09 mg/g, respectively. The POV of soybean oil during storage at 50$^{\circ}C$ was increased up to 4 weeks and then decreased. And as the storage time increased, the contents of stearic and oleic acid were increased, while linoleic and linolenic acid were decreased.

키워드

참고문헌

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