Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) (-) Colorimetry (C) (1) Gas Chromatography/Mass Spectrometry (GC/MS) (6) Sample Type Urine (1) Test Area Test Category Test Sub-Category Test Test Name 5101U Gamma-Hydroxybutyric Acid Confirmation, Urine