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) (7) Sample Type Blood (2) Meconium (1) Serum or Plasma (2) Urine (2) Test Area Newborn Tox (1) (-) Therapeutics (7) Test Category (-) Analgesics (7) Test Sub-Category (-) Opiates/Opioids (7) Your search has returned no tests.