Synonym/Acronym:
N/A.

Common Use:
To assist in diagnosing congenital metabolic disorders in infants, typically homocystinuria, maple syrup urine disease, phenylketonuria (PKU), tyrosinuria, and unexplained mental retardation.

Specimen:
Urine (10 mL) from a random or timed specimen collected in a clean plastic collection container with hydrochloric acid as a preservative.

Normal Findings:
(Method: Chromatography) There are numerous amino acids. Values vary, and the testing laboratory should be consulted for corresponding ranges.