Trommer's sample
The Trommer test (also reduction according to Trommer , Trommer test , Trommer test ) is a chemical-analytical method and serves to detect sugars ( aldoses and ketoses ). It was developed in 1841 by Karl August Trommer (1806–1879) for the detection of glucose in urine . Sodium hydroxide (or potassium hydroxide ) and copper sulfate are heated together with the sample solution. In the presence of reducing substances, a yellow-red cloudy cloudiness of copper (I) hydroxide or a brown-red precipitate of copper (I) oxide occurs, which means a positive Trommer's sample.
Copper (II) ions are reduced to copper (I) ions in the Trommer sample.
See also
The reduction of copper sulfate to copper oxide is also the principle of other indicator reactions. Examples are:
- Fehling's trial
- Benedict reagent (Benidict sample)
- Method according to Luff-Schoorl
Individual evidence
- ↑ a b c Peter Nuhn: Naturstoffchemie , S. Hirzel Wissenschaftliche Verlagsgesellschaft, Stuttgart, 2nd edition, 1990, ISBN 3-7776-0473-9 , p. 186.
- ↑ a b Otto-Albrecht Neumüller (Ed.): Römpps Chemie-Lexikon. Volume 6: T-Z. 8th revised and expanded edition. Franckh'sche Verlagshandlung, Stuttgart 1988, ISBN 3-440-04516-1 , p. 4375.