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an obsolete test for bile in the urine or other body fluid; nitric acid, with a little nitrous acid, is carefully added to a few milliliters of the material to be tested; if bile (bilirubin) is present, it is oxidized to varying degrees, thereby resulting in disclike zones that are (from the interface outward) yellow, red, violet, blue, and green; development of green and violet layers is essential to the validity of the test.
Synonym(s): Rosenbach-Gmelin test
Gmelin,Leopold, German physiologist and chemist, 1788-1853.
Gmelin test - a test for bile in body fluid. Synonym(s): Rosenbach-Gmelin test
Rosenbach-Gmelin test - Synonym(s): Gmelin test
Gmelin test, Gmelin-Rosenbach test
a test for the presence of bilirubin conjugates in feces and urine, based on the conversion of bilirubin to multicolored compounds by the addition of nitric acid.