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Related to Fehling's test: Seliwanoff's test
Fehling's testa procedure used to detect the presence of REDUCING SUGARS in an unknown solution. Two solutions are mixed: Fehling's solution A containing copper tartrate (Cu(II)), and Fehling's solution B containing sodium hydroxide. The mixture is then added to the test solution and boiled. An orange-red precipitate of copper oxide (CU(I)) indicates the presence of a reducing sugar.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005