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) (4) Enzyme-Linked Immunosorbent Assay (ELISA) (5) Enzyme Immunoassay (EIA) (2) Gas Chromatography (GC) (2) (-) Gas Chromatography/Mass Spectrometry (GC/MS) (2) Headspace Gas Chromatography (GC) (13) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (36) Inductively Coupled Plasma/Mass Spectrometry (ICP/MS) (2) Sample Type Blood (1) Fluid (1) Test Area (-) Diagnostic Aids (2) Exposure (5) Therapeutics (13) Test Category Biomarkers (2) Test Sub-Category Small Molecule (2) Test Test Name 0420B Betahydroxybutyric Acid, Blood 0420FL Betahydroxybutyric Acid, Fluid