glossary

fehling's solution

Definition fehling's solution

fehling's solution

fehling's solution a solution used for detecting the presence of sugar in urine. There are two components: Fehling's I (a copper sulphate solution) and Frhling's II (a solution of potassium sodium tartrate and sodium hydroxide), which are kept sepsrate until required for use. Boiling Fehling's solution (equal amounts of Fehling's I and II) is added to an equal volume of boiling urine; a yellowish or brownish coloration indicates the presence of sugar.