Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) (-) Enzyme-Linked Immunosorbent Assay (ELISA) (2) (-) Enzyme Immunoassay (EIA) (2) Gas Chromatography (GC) (24) Gas Chromatography (GC) and Gas Chromatography/Mass Spectrometry (GC/MS) (3) Gas Chromatography/Mass Spectrometry (GC/MS) (6) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (71) High Performance Liquid Chromatography/Tandem Mass Spectrometry (LC-MS/MS) (6) Sample Type Blood (1) Serum or Plasma (1) Urine (2) Test Area Drugs of Abuse (3) (-) Therapeutics (4) Test Category Analgesics (4) Test Sub-Category Opiates/Opioids (4) Your search has returned no tests.