The ELISA (enzyme-linked immunosorbent assay) is a test which uses color change and antibodies to identify a substance. An indirect ELISA is one of three ELISA tests.
Urine varies in appearance, depending principally upon a body's level of hydration, as well as other factors. Normal urine is a transparent solution ranging from colorless to amber but is usually a pale yellow. In the urine of a healthy individual the color comes primarily from the presence of urobilin.
Is It Normal for Urine to Be Clear Like Water. The color of the urine usually signs the change of the kidney tissues. In the normal condition, the urine color should be faint yellow. ...More. Kidney Failure Symptoms: Unable To Pass Urine, Swelling Legs