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) (7) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (20) Sample Type Blood (2) Fluid (1) Serum or Plasma (1) Tissue (1) Test Area Therapeutics (5) Test Category Analgesics (5) Test Sub-Category (-) Opiates/Opioids (5) Other (3) Your search has returned no tests.