Fehling's solution (redirected from Fehling test)

Feh·ling's solution (flngz)

n.

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.

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Fehling's solution

[fā′lingz]

Etymology: Hermann C. von Fehling, German chemist, 1812-1885

a solution containing cupric sulfate and sodium hydroxide and potassium sodium tartrate, used for testing for the presence of glucose and other reducing substances in the urine. Also called Fehling's reagent.

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Fehling's solution

a solution used in clinical pathology as a test for glucose in solutions such as urine. (1) 34.66 g cupric sulfate in water to make 500 ml; (2) 173 g crystallized potassium and sodium tartrate and 50 g sodium hydroxide in water to make 500 ml; mix equal volumes of (1) and (2) at time of use.