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Detection of apple juice adulteration

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The matrix method is what we have chosen to call our approach to detecting adulterated juices. We first got into this back in 1979 when I was with Kroger and the state chemist of Tennessee called to question us about our apple juice, which they thought was adulterated. I told them the way they were testing the product, they could be faked out by the addition of K+ and NH4+ salts. They challenged us to come up with a better way and the matrix was born.

8 pages
Author: A. Brause
Published in FRUIT PROCESSING 7/1998