Folin test

Fo·lin test

1. a quantitative test for uric acid by means of the color produced with phosphotungstic acid and a base;
2. a quantitative test for urea; the urea is decomposed by boiling with magnesium chloride, and the freed ammonia is measured.


Otto K.O., U.S. biochemist, 1867-1934.
Folin reaction - the reaction of amino acids in alkaline solution with 1,2-naphthoquinone-4-sulfonate (Folin reagent) to yield a red color. Synonym(s): Folin reagent
Folin reagent - Synonym(s): Folin reaction
Folin test - a quantitative test for urea.
Folin-Looney test - a test for tyrosine that gives a blue color in alkaline solution with a reagent consisting of sodium tungstate, phosphomolybdic acid, and phosphoric acid.
Lowry-Folin assay - Synonym(s): Lowry protein assay