Organic dairy cows must spend at least 120 days each year outside, feeded with a minimum of 30% fresh, foraged grass. But how to verify that? Usually the cumbersome and time-consuming gas chromatography is the applied testification method. With more than 100€ per sample it is also expensive and not scalable. The answer to detect signatures in the milk, stated by a Iowa state study, should be fluorescence spectroscopy: Almost no sample preparation involved and the answer is quite immediately available. Jacob Petrich, biochemist and co-Author underlines:” Spectroscopy is easy”!
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