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) (5) Enzyme Immunoassay (EIA) (1) (-) Gas Chromatography (GC) (3) Gas Chromatography/Mass Spectrometry (GC/MS) (4) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (11) Sample Type Blood (3) Fluid (1) Serum or Plasma (2) Tissue (1) Urine (1) Test Area Therapeutics (8) Test Category (-) Analgesics (8) Test Sub-Category (-) Opiates/Opioids (8) Other (3) Your search has returned no tests.