Fo·lin-Loon·ey test(fol'-in lū'nē),
an obsolete test for tyrosine that gives a blue color in alkaline solution with a reagent consisting of sodium tungstate, phosphomolybdic acid, and phosphoric acid.
Folin-Looney testAn obsolete colorimetric test for tyrosine; the reference method for determining the serum level of tyrosine is ion-exchange column chromatography. The most convenient method is the Udenfriend-Cooper fluorometric procedure, which is not suitable for urine and nonspecific—it detects other compounds present in low (i.e., not significant) amounts. Tyrosine may also be detected by enzyme assays.
Folin,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
Looney,Joseph M., U.S. biochemist, 1896–.
Folin-Looney test - see under Folin