Fehling's solution

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Related to Fehling test: Benedict test, Barfoed's test

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 ?
Test procedures carried out were, foaming assay for saponins; dragendorff's test for Alkaloids; baljet test for sophisticated lactones; liebermann-burchard test for triterpenes and steroids; fehling test for reducing sugars; ninhydrine test for amino acids; shinoda assay for flavonoids; borntragers test for quinines; salkowski test for terpenoids; ferric chloride test for tannins; and kedde's assay for cardiotonic glycosides.
d) Fehling Test for Combined Reducing Sugar: Small quantity of each extract was hydrolyzed by boiling with 5 ml of dilute HCl and the resulting solution neutralized with NaOH solution.
Theodore Peters, Jr., PhD, DABCC, FACB, developed a fascination with chemistry as a young boy in Chambersburg, PA, watching his physician father perform Fehling tests for urinary sugar and hanging around the back room of the nearby apothecary.