In this article:
Due to rising cost of silver nitrate, used in staining reaction to detect skin damage in dried grapes, a less expensive alternative test is sought.
Previous research suggests interactions between ferrous (Fe++) and hydroxl (OH–) ions and polyphenolics may provide a favourable alternative test.
A suggested procedure for such a test is given and the results discussed.
A Test for Skin Damage of Dry Grapes
1978, Food Technology in Australia, vol 30, issue 10, month 10, pages 391-392
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