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| Molkentin, Joachim; Giesemann, Anette. |
| Analysis of the stable isotope ratio of carbon (δ13C) and α-linolenic acid (C18:3ω3) content in milk fat is a useful indicator of organic milk production. Referring to corresponding measurements, further analyses of stable isotope ratios were performed in 120 samples of conventionally and organically produced whole milk collected from German retailers during a period of 18 months. Conventional milk predominantly exhibited higher δ15N values than organic milk, the latter of which never exceeded a maximum δ15N threshold value of 5.50‰. Measurements of δ34S did not differ significantly between organic and conventional milk. Because δ13C, in general, is related to maize consumption, δ13C in milk protein and δ13C in milk fat were equally suited for... |
| Tipo: Journal paper |
Palavras-chave: Food security; Food quality and human health Consumer issues. |
| Ano: 2010 |
URL: http://orgprints.org/17760/1/Molkentin_Giesemann_ABC_398_(2010)_1493%2D1500.pdf |
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| Molkentin, Joachim; Giesemann, Anette. |
| Increasing sales of organic milk mean intensified tests for authenticity are required. In addition to comprehensive documentation, analytical methods to identify organic milk, and thus to differentiate it from conventional milk, are needed for consumer protection. Because the composition of milk is fundamentally dependent on the feeding of the cows, thirty-five samples from both production systems in Germany, including farm and retail milk, were collected within 12 months, to reflect seasonal variation, and appropriate properties were analysed. Fatty acid analysis enabled organic and conventional milk to be completely distinguished, because of the higher α-linolenic acid (C18:3ω3) and eicosapentaenoic acid (C20:5ω3) content of the former. Organic milk fat... |
| Tipo: Journal paper |
Palavras-chave: Food security; Food quality and human health Consumer issues. |
| Ano: 2007 |
URL: http://orgprints.org/17235/1/Molkentin_ABC_388_(2007)_297%2D305.pdf |
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