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) (1) (-) Gas Chromatography (GC) (1) Gas Chromatography/Mass Spectrometry (GC/MS) (1) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (5) Sample Type Blood (14) Fluid (1) Serum or Plasma (13) (-) Tissue (2) Urine (8) Test Area Exposure (2) (-) Therapeutics (2) Test Category Analgesics (1) Antidepressants (1) Test Sub-Category Opiates/Opioids (1) Tricyclic (1) Test Test Name 3220TI Nortriptyline, Tissue 3236TI Opiates Screen, Tissue