Determination of organic milk authenticity using carbon and nitrogen natural isotopes

•Organic milk authenticity was determined by using δ13C and δ15N.•Mean carbon isotope ratio (δ13C) was higher in organic milk (OM) than in conventional milk (CM).•Mean nitrogen isotope ratio (δ15N) was lower in the OM than in the CM.•The combination of δ13C and δ15N was more effectively distinguishe...

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Veröffentlicht in:	Food chemistry 2014-10, Vol.160, p.214-218
Hauptverfasser:	Chung, Ill-Min, Park, Inmyoung, Yoon, Jae-Yeon, Yang, Ye-Seul, Kim, Seung-Hyun
Format:	Artikel
Sprache:	eng
Schlagworte:	Animals Authenticity Biological and medical sciences Carbon isotope Carbon Isotopes - analysis Cattle Food toxicology Mass Spectrometry Medical sciences Milk - chemistry Nitrogen isotope Nitrogen Isotopes - analysis Organic milk Stable isotope ratio mass spectrometry Toxicology
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Zusammenfassung:	•Organic milk authenticity was determined by using δ13C and δ15N.•Mean carbon isotope ratio (δ13C) was higher in organic milk (OM) than in conventional milk (CM).•Mean nitrogen isotope ratio (δ15N) was lower in the OM than in the CM.•The combination of δ13C and δ15N was more effectively distinguished between OM and CM. Natural stable isotopes of carbon and nitrogen (12C, 13C, 14N, 15N) have abundances unique to each living creature. Therefore, measurement of the stable isotope ratio of carbon and nitrogen (δ13C=13C/12C, δ15N=15N/14N) in milk provides a reliable method to determine organic milk (OM) authenticity. In the present study, the mean δ13C value of OM was higher than that of conventional milk (CM), whereas the mean δ15N value of OM was lower than that of CM; nonetheless both δ13C and δ15N values were statistically different for the OM and CM (P
ISSN:	0308-8146 1873-7072
DOI:	10.1016/j.foodchem.2014.01.061