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