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) (1) (-) Gas Chromatography/Mass Spectrometry (GC/MS) (1) Sample Type Blood (1) (-) Fluid (1) Test Area Diagnostic Aids (1) Test Category Anesthetics (1) (-) Biomarkers (1) Plasticizers (1) Sedative/Hypnotics (4) Volatiles (1) Test Sub-Category Small Molecule (1) Test Test Name 0420FL Betahydroxybutyric Acid, Fluid