what indicator is used to test for proteins
The Biuret Test works for any compound containing two or more of the following groups. Ninhydrin Test: The Ninhydrin Test is a test for amino acids and proteins with a free -NH2 group. When such an -NH2 group reacts with ninhydrin, a purple-blue complex is formed. | Chemistry Home | Dr. Sundin Home | Chemistry 3510 | sundin@uwplatt.edu |.