Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) Colorimetry (C) (2) (-) Enzyme-Linked Immunosorbent Assay (ELISA) (5) Enzyme Immunoassay (EIA) (1) Gas Chromatography (GC) (18) Gas Chromatography/Mass Spectrometry (GC/MS) (4) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (26) Sample Type Blood (2) Fluid (1) Serum or Plasma (1) Tissue (1) Test Area Therapeutics (5) Test Category (-) Analgesics (5) Hallucinogens (3) Test Sub-Category Opiates/Opioids (5) Your search has returned no tests.