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) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (13) Sample Type Blood (4) Fluid (3) Serum or Plasma (4) Tissue (2) Urine (2) Test Area Therapeutics (15) Test Category (-) Analgesics (15) Depressants (6) Test Sub-Category (-) Opiates/Opioids (15) Organic (4) Your search has returned no tests.