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In organic chemistry, Fehling's solution is a chemical reagent used to differentiate between water-soluble carbohydrate and ketone (>C=O) functional groups, and as a test for reducing sugars and non-reducing sugars, supplementary to the Tollens' reagent test. The test was developed by German chemist Hermann von Fehling in 1849. [1]
Hermann von Fehling was born in Lübeck.With the intention of taking up pharmacy he entered Heidelberg University about 1835. After graduating he went to Gießen as preparateur to Justus von Liebig, with whom he elucidated the composition of paraldehyde and metaldehyde.
Reagent testers might show the colour of the desired substance while not showing a different colour for a more dangerous additive. [2] For this reason it is essential to use multiple different tests to show all adulterants.
The concentration of Cu 2+ in Fehling’s solution is 0.14 M, which is capable of oxidizing 0.070 M maltose. 5 mL of Fehling’s solution can oxidize 0.070 M x 0.005 L = 0.00035 moles of maltose. A 100 °L malt extract produces 0.00035 mol maltose in 60 min, or 5.8 μmol/min, or 5.8 IU of enzyme activity in 0.1 mL of a 5 g/100 mL (5%) infusion.
AMSTERDAM (Reuters) -The head of the chemical weapons watchdog said on Thursday he would ask Syria's new leaders to grant investigators access to the country to continue work identifying ...
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The nature of the complex formed in Fehling's solution is [Cu(L-tartH-2) 2] 6-(tart = tartrate) Therefore, all hydroxyl groups are deprotonated and the ball and stick model showed in the article is false. Moreover, L-tartaric acid is used to prepare Fehling's solution, so the citation of the publication dealing with complex compounds of copper ...
One month into his stay at the NICU at M Health Fairview Masonic Children's Hospital, Cooper got a neighbor, Raghu, who weighed even less than him. The parents quickly connected.