title: A triple-isotope approach for discriminating the geographic origin of Asian sesame oils.
abstract: The aim of this study was to investigate the effects of the geographic location and climatic characteristics of the sesame-producing sites on the carbon, hydrogen, and oxygen stable isotope ratios of Korean sesame oil. In addition, the study aimed to differentiate Korean sesame oil from Chinese and Indian sesame oils using isotopic data in combination with canonical discriminant analysis. The isotopic data were obtained from 84 roasted oil samples that were prepared from 51 Korean, 19 Chinese, and 14 Indian sesame seeds harvested during 2010-2011 and distributed in Korea during the same period. The δ(13)C, δD, and δ(18)O values of Korean sesame oil were negatively correlated with latitude, distance from the sea, and precipitation (May-September), respectively. By applying two canonical discriminant functions, 89.3% of the sesame oil samples were correctly classified by their geographic origin, indicating that the triple-isotope approach is a useful tool for the traceability of the oils.
authors.affiliation: Department of Food Science and Technology, Chung-Ang University, Anseong 456-756, Republic of Korea.
authors.forename: Hyeonjin
authors.initials: H
authors.lastname: Jeon
authors.affiliation: Bee Product Research Center, Korea Apicultural Association, Seoul 137-070, Republic of Korea.
authors.forename: Sang-Cheol
authors.initials: SC
authors.lastname: Lee
authors.affiliation: National Institute of Food and Drug Safety Evaluation, Korea Food and Drug Administration, Cheongwon 363-700, Republic of Korea.
authors.forename: Yoon-Jae
authors.initials: YJ
authors.lastname: Cho
authors.affiliation: National Institute of Food and Drug Safety Evaluation, Korea Food and Drug Administration, Cheongwon 363-700, Republic of Korea.
authors.forename: Jae-Ho
authors.initials: JH
authors.lastname: Oh
authors.affiliation: National Institute of Food and Drug Safety Evaluation, Korea Food and Drug Administration, Cheongwon 363-700, Republic of Korea.
authors.forename: Kisung
authors.initials: K
authors.lastname: Kwon
authors.affiliation: Department of Food Science and Technology, Chung-Ang University, Anseong 456-756, Republic of Korea. Electronic address: bhkim@cau.ac.kr.
authors.forename: Byung Hee
authors.initials: BH
authors.lastname: Kim
mesh_terms: D001208:Asia; D007554:Isotopes / Q000032:analysis*; D010100:Oxygen / Q000032:analysis; D010938:Plant Oils / Q000032:analysis; D012715:Sesame Oil / Q000032:analysis*
chemical_list: D007554:Isotopes; D010938:Plant Oils; D012715:Sesame Oil; D010100:Oxygen
keywords: Canonical discriminant analysis; Carbon stable isotope; Geographic origin; Hydrogen stable isotope; Oxygen stable isotope; Sesame oil