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 (GC) (2) (-) Gas Chromatography/Mass Spectrometry (GC/MS) (1) Sample Type (-) Blood (1) Fluid (1) Test Area Diagnostic Aids (1) Test Category Anesthetics (1) Antidepressants (2) (-) Biomarkers (1) Plasticizers (1) Sedative/Hypnotics (5) Volatiles (3) Test Sub-Category Small Molecule (1) Test Test Name 0420B Betahydroxybutyric Acid, Blood