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) (6) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (52) (-) High Performance Liquid Chromatography/Tandem Quadrupole Time of Flight Mass Spectrometry. (4) Sample Type Blood (4) Serum or Plasma (4) Tissue (1) Urine (4) Test Area Drugs of Abuse (11) (-) Therapeutics (13) Test Category Analgesics (9) Anesthetics (4) Test Sub-Category Opiates/Opioids (9) Other (4) Your search has returned no tests.