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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 ...
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 ...
The rapid furfural test is a chemical test used to distinguish between glucose and fructose. The rapid furfural test is similar to Molisch's test but uses concentrated hydrochloric acid instead of concentrated sulfuric acid and the solution is boiled. [1] Dilute sugar solution is added to ethanolic 1-naphthol and concentrated hydrochloric acid ...
With his historical detection reaction from 1904, the lactose content of dairy products can be visualized. [2] This is useful because many people are lactose intolerant and avoid dairy products. Countless pharmacy students, but also physicians, laboratory assistants, and recently also chemistry teachers know the Wöhlk test. [3]
Hans Molisch bust at the University of Vienna. Hans Molisch (6 December 1856, Brünn, Habsburg Moravia - 8 December 1937, Wien, Austria) was a Czech-Austrian botanist.. Molisch's test is named after him, it is a sensitive chemical test for the presence of carbohydrates.
A new Clean Label Project report suggests some protein powders contain heavy metals lead and cadmium. See which ones are safe here, plus what an expert advises.
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