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) (3) Enzyme Immunoassay (EIA) (3) Gas Chromatography (GC) (34) Gas Chromatography/Mass Spectrometry (GC/MS) (1) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (29) High Performance Liquid Chromatography/Tandem Quadrupole Time of Flight Mass Spectrometry. (2) Sample Type Blood (3) (-) Serum or Plasma (3) Test Area Drugs of Abuse (3) (-) Therapeutics (3) Test Category Analgesics (3) Test Sub-Category Opiates/Opioids (3) Your search has returned no tests.