Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) Enzymatic Assay (EZA) (5) Gas Chromatography (GC) (3) (-) Gas Chromatography/Mass Spectrometry (GC/MS) (2) Headspace Gas Chromatography (GC) (4) Inductively Coupled Plasma/Mass Spectrometry (ICP/MS) (3) Sample Type Blood (1) Fluid (1) Test Area (-) Diagnostic Aids (2) Drugs of Abuse (18) Exposure (31) Impairment (3) Newborn Tox (1) Postmortem (11) Therapeutics (52) Test Category Biomarkers (2) Test Sub-Category Small Molecule (2) Test Test Name 0420B Betahydroxybutyric Acid, Blood 0420FL Betahydroxybutyric Acid, Fluid