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) (8) (-) Enzyme Immunoassay (EIA) (1) Gas Chromatography (GC) (4) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (40) (-) High Performance Liquid Chromatography/Tandem Mass Spectrometry (LC-MS/MS) (2) Sample Type Blood (1) Serum or Plasma (1) Urine (1) Test Area (-) Therapeutics (3) Test Category Analgesics (1) Antacids (2) Test Sub-Category Opiates/Opioids (1) Proton-Pump Inhibitors (2) Your search has returned no tests.