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Oxidative Stability of Grape Seed Oil by Addition of Grape Seed Extract

포도씨추출물을 첨가한 포도씨유의 산화 안정성

  • Jang, Sungho (Department of Food Science and Biotechnology, Chungbuk National University) ;
  • Lee, Junsoo (Department of Food Science and Biotechnology, Chungbuk National University) ;
  • Choi, Won-Seok (Department of Food Science and Technology, Korea National University of Transportation)
  • 장성호 (충북대학교 식품생명공학과) ;
  • 이준수 (충북대학교 식품생명공학과) ;
  • 최원석 (한국교통대학교 식품공학과)
  • Received : 2015.08.06
  • Accepted : 2015.08.31
  • Published : 2015.12.31

Abstract

Grape seed extract (GSE) was added to grape seed oil to improve the oxidative stability of the grape seed oil during storage. To measure the oxidative stability of grape seed oil, peroxide value, acid value, and conjugated diene value were measured, and changes in browning, vitamin E, fatty acid composition, and polyphenol content of oil were examined. In the case of grape seed oil with GSE, peroxide value, acid value, and conjugated diene value were lower than those of grape seed oil. The magnitude of increase in absorbance of grape seed oil with GSE was less than that of additive-free grape seed oil, whereas the magnitude of decrease in vitamin E isomers in grape seed oil with GSE was less than that of grape seed oil with no additive. Changes in fatty acid composition were also similar. However, polyphenol contents showed the greatest reduction in grape seed oil containing GSE. GSE contributes to the oxidation stability of grape seed oil, but the antioxidant capacity of GSE was lower than that of butylated hydroxytoluene.

본 연구에서는 높은 불포화지방산 함유율로 말미암아 항산화 성분을 함유하고 있음에도 불구하고 산패에 대한 위험성을 내포하고 있는 포도씨유에 다량의 항산화 성분을 함유한 것으로 알려진 포도씨추출물을 첨가하여 포도씨추출물 함유 포도씨유의 90일 동안의 저장 중 산화 안정성을 측정하였고, 갈색화, 비타민 E, 지방산 조성 및 폴리페놀 함량 변화를 조사해 보았다. 포도씨추출물을 첨가한 포도씨유의 경우 무첨가 포도씨유보다 저장기간 동안 과산화물가, 산가 및 공액이중결합가가 모두 낮아 포도씨추출물이 포도씨유의 산화 안정성에 기여하는 것으로 나타났다. 저장 중 흡광도 증가량 역시 포도씨추출물 첨가 포도씨유가 무첨가 포도씨유에서보다 적게 나타났고, 비타민 E 이성체의 감소량 또한 무첨가 포도씨유에서보다 포도씨추출물 첨가 포도씨유에서 적게 나타났으며, 지방산 조성 변화 역시 무첨가 포도씨유에서보다 포도씨추출물 첨가 포도씨유에서 적게 나타났다. 한편 저장 중 폴리페놀 함량 감소량은 포도씨추출물 함유 포도씨유에서 가장 크게 나타났다. 따라서 포도씨추출물은 저장 중 포도씨유의 산화 안정성에 기여하는 것으로 확인되었으며, 다만 그 능력은 합성항산화제인 butylated hydroxytoluene보다는 낮은 것으로 조사되었다.

Keywords

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