INTRODUCTIONThe origin of dairy products is of interest in the United States (U.S.) given the ethical and ecological implications of modern cattle rearing practices. To meet the growing transparency demands of consumers, dairy distributors have introduced products with specific production method (organic, pasture‐raised, etc.) and geographic origin ('Real California Milk' and 'Eat Wisconsin Cheese') claims and priced them higher than their conventional counterparts, making them prime targets for counterfeiting and fraud. Thus, there is a pressing need for simple methods of verifying the geographic origin and production method of U.S. dairy products.Numerous verification methods have been proposed, including analysis of fatty acids, fat soluble vitamins, and ultraviolet‐absorbing compounds. While these methods have demonstrated various levels of success in differentiating feeding regimes and geographic origins of animal‐based food products, the analysis of these compounds requires complex pre‐extraction and purification steps, rendering the methods incompatible with the large‐scale sampling efforts that a nationwide authentication effort would entail.One emerging method for food product origin assessment, which overcomes the above limitations, is Stable Isotope Analysis (SIA) of dairy products. SIA requires no complicated extraction steps and can be run on an automated isotope ratio mass spectrometer. Since stable isotope ratios of animal tissues
Rapid Communications in Mass Spectrometry – Wiley
Published: Jan 15, 2018
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