Discrimination of organic milk by stable isotope ratio, vitamin E, and fatty acid profiling combined with multivariate analysis: A case study of monthly and seasonal variation in Korea for 2016-2017
| Autor: | Jae Kwang Kim, Kyoung-Jin Lee, Na-Young Son, Min-Jeong An, Yeon-Ju An, Ill-Min Chung, Seung-Hyun Kim, Ji-Hee Lee |
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| Rok vydání: | 2017 |
| Předmět: |
Multivariate analysis
medicine.medical_treatment Biology 01 natural sciences Analytical Chemistry 0404 agricultural biotechnology Animal science Isotopes Republic of Korea medicine Food Quality Animals Vitamin E Organic milk chemistry.chemical_classification δ13C Stable isotope ratio 010401 analytical chemistry Fatty Acids Fatty acid 04 agricultural and veterinary sciences General Medicine δ15N Seasonality medicine.disease 040401 food science 0104 chemical sciences Milk chemistry Multivariate Analysis Seasons Nutritive Value Food Science |
| Zdroj: | Food chemistry. 261 |
| ISSN: | 1873-7072 |
| Popis: | This study examined the monthly and seasonal variations of δ13C, δ15N, fatty acids (FAs), and vitamin E in organic milk (OM) and conventional milk (CM) collected in Korea during 2016-2017, discriminating OM authenticity with chemometric approaches. Compared to CM, the mean δ13C and δ15N values were lower in OM, whereas the mean α-tocopherol and nutritionally desirable FA contents were higher in OM. Furthermore, δ13C, δ15N, and FA contents vary significantly with the season in OM, whereas α-tocopherol does not show a specific seasonal trend in either OM or CM. Chemometric approaches provided reliable chemical markers, notably C18:3n-3, C18:2n-6, and δ13Cbulk-milk, for accurate OM discrimination according to sampling season. Our findings elucidate milk nutritional quality issues and also provide valuable insight into the control of fraudulent OM labeling in Korea, with potential application in other countries. |
| Databáze: | OpenAIRE |
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