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) (4) Sample Type Blood (2) (-) Serum or Plasma (2) (-) Urine (2) Test Area Test Category Test Sub-Category Test Test Name 5101SP Gamma-Hydroxybutyric Acid Confirmation, Serum/Plasma 5101U Gamma-Hydroxybutyric Acid Confirmation, Urine 9326SP Gamma-Hydroxybutyric Acid Screen, Serum/Plasma 9326U Gamma-Hydroxybutyric Acid Screen, Urine