Fehling's solution

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Feh·ling's solution

An aqueous solution of copper sulfate, sodium hydroxide, and potassium sodium tartrate used to test for the presence of sugars and aldehydes in a substance, such as urine.

[After Hermann von Fehling (1812-1885), German chemist.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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Noun1.Fehling's solution - a liquid solution of copper sulfate and potassium tartrate and sodium hydroxide that is used to test for sugar in the urine; solution turns reddish when sugar is present
solution - a homogeneous mixture of two or more substances; frequently (but not necessarily) a liquid solution; "he used a solution of peroxide and water"
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References in periodicals archive ?
Sodium Potassium Tartrate is also a vital ingredient of Fehling's Solution and a ferroelectric crystal often used as a component of Fenton's reagent.
###(Fehling's Solution)###(NaOH test)###(FeCl3 test) (Wagner Test)###(Mayer's Test)###glycosides
To 1 ml of the concentrate, few drops of Fehling's solution were included and observed for the brick red precipitate.
For the two exo-enzymes, the quantities of reducing sugar were determined by adding 0.5 ml of the reaction mixture with 0.5 ml of Fehling's solution, boiling the mixture for 20 min and measuring absorbances at 520 nm using Spectrophotometer.
The solution was transferred to a burette and titrated against 10 ml Fehling's solution to get brick red using Methylene blue as an indicator.
A small amount of extract was dissolved in 1 ml of water and alcohol then boiled with Fehling's solution. Any brick-red precipitation was noted.