5H 2 O sodium citrate Na 3 C 6 H 5 O 7 and sodium carbonate Na 2 CO 3 in distilled water 4. When a reducing sugar is subjected to heat in the presence of an alkali it gets converted into an enediol which is a relatively powerful reducing agent. Benedict S Test Principle Composition Preparation Procedure And Result Interpretation It Identifies Reducing Sug Microbiology Functional Group Preparation Benedicts solution can be used to test for the presence of glucose in urine. . Reducing Sugars are sugars that contain aldehyde groups that are oxidised to carboxylic acids R-COOH. Fehlings solution To test for the presence reducing sugars to the juice a small amount of Fehlings solution is added and boiled in a water bath. Which food samples contain. Saul Roseman remembers that all inductees into the army during World War II had their urine tested for sugar with Benedicts. Some elements and compounds can be both reducing or oxidi...