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) (2) Enzyme Immunoassay (EIA) (1) (-) Gas Chromatography/Mass Spectrometry (GC/MS) (2) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (11) Sample Type Blood (2) Fluid (1) Serum or Plasma (1) Test Area Diagnostic Aids (2) Therapeutics (2) Test Category Analgesics (2) Biomarkers (2) Test Sub-Category Barbiturates (15) Benzodiazepines (4) (-) Opiates/Opioids (2) Other (5) (-) Small Molecule (2) Test Test Name 0420B Betahydroxybutyric Acid, Blood 0420FL Betahydroxybutyric Acid, Fluid 0802B Buprenorphine and Metabolite - Free (Unconjugated) Screen, Blood 0802SP Buprenorphine and Metabolite - Free (Unconjugated) Screen, Serum/Plasma