期刊
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
卷 96, 期 7, 页码 2433-2439出版社
WILEY
DOI: 10.1002/jsfa.7363
关键词
rice geographical origin; isotope ratio; light elements; chemometrics; IRMS
资金
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education, Science and Technology [NRF-2014R1A1A2055017]
- National Research Foundation of Korea [22A20153813519, 2014R1A1A2055017] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
BACKGROUNDAlthough rice (Oryza sativa L.) is the third largest food crop, relatively fewer studies have been reported on rice geographical origin based on light element isotope ratios in comparison with other foods such as wine, beef, juice, oil and milk. Therefore this study tries to discriminate the geographical origin of the same rice cultivars grown in different Asian countries using the analysis of C, N, O and S stable isotope ratios and chemometrics. RESULTSThe N-15(AIR), O-18(VSMOW) and S-34(VCDT) values of brown rice were more markedly influenced by geographical origin than was the C-13(VPDB) value. In particular, the combination of O-18(VSMOW) and S-34(VCDT) more efficiently discriminated rice geographical origin than did the remaining combinations. Principal component analysis (PCA) revealed a clear discrimination between different rice geographical origins but not between rice genotypes. In particular, the first components of PCA discriminated rice cultivated in the Philippines from rice cultivated in China and Korea. CONCLUSIONThe present findings suggest that analysis of the light element isotope composition combined with chemometrics can be potentially applicable to discriminate rice geographical origin and also may provide a valuable insight into the control of improper or fraudulent labeling regarding the geographical origin of rice worldwide. (c) 2015 Society of Chemical Industry
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