Follow-up of stable isotope analysis of organic versus conventional milk

Analytical and Bioanalytical Chemistry
Joachim Molkentin, Anette Giesemann

Abstract

Analysis of the stable isotope ratio of carbon (delta (13)C) and alpha-linolenic acid (C18:3omega3) 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 delta (15)N values than organic milk, the latter of which never exceeded a maximum delta (15)N threshold value of 5.50 per thousand. Measurements of delta (34)S did not differ significantly between organic and conventional milk. Because delta (13)C, in general, is related to maize consumption, delta (13)C in milk protein and delta (13)C in milk fat were equally suited for authentication of organic milk. Thus, a high correlation (r = 0.99) was established between delta (13)C in milk protein and lipids. Although occurring on different levels in organic and conventional milk, the relatively constant fractionation of carbon isotopes between protein and fat will allow for the advanced detection of adulteration in processed milk products, such as fraudulent combinations of organic milk fat and ...Continue Reading

References

Mar 31, 2005·Journal of Agricultural and Food Chemistry·Paolo RapisardaFrancesco Intrigliolo
May 17, 2006·Journal of Dairy Science·K A EllisM Mihm
Aug 10, 2006·Analytical and Bioanalytical Chemistry·N KnobbeA Preiss-Weigert
Mar 8, 2007·Journal of Agricultural and Food Chemistry·Alison S BatemanMark Woolfe
Mar 30, 2007·Analytical and Bioanalytical Chemistry·Joachim Molkentin, Anette Giesemann
Jan 8, 2008·Journal of Environmental Quality·Francisco M del AmorPedro M Aparicio
May 1, 2008·Rapid Communications in Mass Spectrometry : RCM·Federica CaminGiuseppe Versini
Jan 10, 2009·Journal of Agricultural and Food Chemistry·Joachim Molkentin
Feb 10, 2010·Journal of Agricultural and Food Chemistry·Nicole Tanz, Hanns-Ludwig Schmidt

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Citations

Oct 17, 2012·Journal of the Science of Food and Agriculture·Edoardo CapuanoSaskia M van Ruth
Jun 6, 2014·Journal of the Science of Food and Agriculture·Daniel KuscheTon Baars
Oct 18, 2016·Critical Reviews in Food Science and Nutrition·Caio T Inácio, Phillip M Chalk
Apr 12, 2017·Journal of the Science of Food and Agriculture·Eunyoung HongHyang Sook Chun
Jan 31, 2018·Rapid Communications in Mass Spectrometry : RCM·Joshua N BosticA Hope Jahren
Mar 25, 2018·Electrophoresis·Marina Creydt, Markus Fischer
Jul 16, 2013·Journal of Dairy Science·A CarpioM Valcárcel
May 23, 2020·Critical Reviews in Analytical Chemistry·Shanshan Zhao, Yan Zhao
Sep 1, 2016·Comprehensive Reviews in Food Science and Food Safety·Federica CaminEdi Piasentier
Dec 14, 2018·Journal of Agricultural and Food Chemistry·Ill-Min ChungSeung-Hyun Kim

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