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제114회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Discrimination of Geographical Origin and Authenticity of Sesame Oils Using 1H NMR Spectroscopy with Discriminant Analysis

등록일
2014년 8월 27일 14시 52분 20초
접수번호
0464
발표코드
ANAL.P-520 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
10월 15일 (수요일) 16:00~19:00
발표형식
포스터
발표분야
분석화학
저자 및
공동저자
이윤희, 진경수, 김지은, 신지영, 전재경, 이효진, 정용애, 장석규, 안상두*
중앙대학교 화학과, Korea
The geographical origin and authenticity of sesame oil are important issues in Korea because its price is decided by the geographical origin of sesame seeds and ratio of sesame oil. Especially, the price between domestic and imported sesame seeds is significantly different. Also, flavored oil which has a low ratio of sesame oil is more cheaper than pure sesame oil. In this study, we prepared sesame oils from 72 Korean, 20 Chinese, and 18 Indian white sesame seeds and flavored oils from 44 different commercial products in the deuterated chloroform solvent and obtained their 1H nuclear magnetic resonance (NMR) spectra at 600 MHz NMR spectrometer. And the discriminant analysis of the SPSS statistics 21 was used to discriminate geographical origin and authenticity. The NMR spectra showed the existence of fatty acids and lignans which are ingredients of the sesame oils. We measured the ratio of double bonds in fatty acids and the amount of some lignans (sesamol, sesamolin) by integrating the NMR peaks and found they are important factors to discriminate the origin and authenticity of sesame oils. The geographical origin of sesame oils from Korea, China, and India was well defined by using two discriminant functions at 92.7 %, and Korean sesame oils were distinguished from the other imported sesame oils by using discriminant functions. Also, pure sesame oils were distinguished from flavored oils at 100% by using discriminant functions. These results suggest that NMR-based discrimination is a useful method to categorize sesame oil according to its geographical origin.

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