<P> Heller's test is a chemical test that shows that strong acids cause the denaturation of precipitated proteins . Concentrated nitric acid is added to a protein solution from the side of the test tube to form two layers . A white ring appears between the two layers if the test is positive . Heller's test is commonly used to test for the presence of proteins in urine . This test was invented by the Austrian Chemist, Johann Florian Heller (1813 - 1871). </P>

Why is heller’s test used to determine the presence of albumin in urine