Addition of mandarin juice in orange juice has been detected using DNA methodology (heteroduplex). A new approach to identify citrus fruit varieties is given in this paper by a cooperative project from FAO/IAEA using LC-MS and analysis of specific metabolomic markers. Statistical treatment allowed adulteration to be detected down to 1%.
Read more at: http://www.sciencedirect.com/science/article/pii/S0956713515302668
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