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) (3) Gas Chromatography (GC) (3) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (12) High Performance Liquid Chromatography/Tandem Mass Spectrometry (LC-MS/MS) (1) Sample Type (-) Blood (3) Fluid (1) Hair (1) Serum or Plasma (2) Tissue (1) Test Area Therapeutics (3) Test Category Analgesics (3) Test Sub-Category Opiates/Opioids (3) Your search has returned no tests.