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  2. Seliwanoff's test - Wikipedia

    en.wikipedia.org/wiki/Seliwanoff's_test

    An example of a positive Seliwanoff’s test. Seliwanoff’s test is a chemical test which distinguishes between aldose and ketose sugars. If the sugar contains a ketone group, it is a ketose. If a sugar contains an aldehyde group, it is an aldose. This test relies on the principle that, when heated, ketoses are more rapidly dehydrated than ...

  3. Ketose - Wikipedia

    en.wikipedia.org/wiki/Ketose

    Ketoses and aldoses can be chemically differentiated through Seliwanoff's test, where the sample is heated with acid and resorcinol. [4] The test relies on the dehydration reaction which occurs more quickly in ketoses, so that while aldoses react slowly, producing a light pink color, ketoses react more quickly and strongly to produce a dark red color.

  4. Chemical test - Wikipedia

    en.wikipedia.org/wiki/Chemical_test

    Seliwanoff's test differentiates between aldose and ketose sugars; Test for lipids: add ethanol to sample, then shake; add water to the solution, and shake again. If fat is present, the product turns milky white. The Sakaguchi test detects the presence of arginine in protein; The Hopkins–Cole reaction tests for the presence of tryptophan in ...

  5. Category:Carbohydrate methods - Wikipedia

    en.wikipedia.org/wiki/Category:Carbohydrate_methods

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  6. Aldose - Wikipedia

    en.wikipedia.org/wiki/Aldose

    Fischer projection of D-glyceraldehyde. Like most carbohydrates, simple aldoses have the general chemical formula C n (H 2 O) n.Because formaldehyde (n=1) and glycolaldehyde (n=2) are not generally considered to be carbohydrates, [1] the simplest possible aldose is the triose glyceraldehyde, which only contains three carbon atoms.

  7. Molisch's test - Wikipedia

    en.wikipedia.org/wiki/Molisch's_test

    Molisch test (using α-napthol) indicating a positive result (see purple ring). Molisch's test is a sensitive chemical test, named after Austrian botanist Hans Molisch, for the presence of carbohydrates, based on the dehydration of the carbohydrate by sulfuric acid or hydrochloric acid to produce an aldehyde, which condenses with two molecules of a phenol (usually α-naphthol, though other ...

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  9. Resorcinol - Wikipedia

    en.wikipedia.org/wiki/Resorcinol

    Resorcinol (or resorcin) is a phenolic compound.It is an organic compound with the formula C 6 H 4 (OH) 2.It is one of three isomeric benzenediols, the 1,3-isomer (or meta-isomer).