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) (6) Enzyme Immunoassay (EIA) (3) Gas Chromatography (GC) (62) Gas Chromatography/Mass Spectrometry (GC/MS) (3) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (54) High Performance Liquid Chromatography/Tandem Quadrupole Time of Flight Mass Spectrometry. (4) Sample Type Blood (3) Serum or Plasma (3) Test Area Drugs of Abuse (7) (-) Therapeutics (6) Test Category Analgesics (6) Test Sub-Category Opiates/Opioids (6) Your search has returned no tests.