Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) (-) Gas Chromatography (GC) (1) (-) Gas Chromatography/Mass Spectrometry (GC/MS) (1) Sample Type Blood (3) Serum or Plasma (1) (-) Tissue (2) Urine (2) Test Area Therapeutics (2) Test Category (-) Anesthetics (1) (-) Antidepressants (1) Test Sub-Category Other (1) Tricyclic (1) Test Test Name 3214TI Nitrous Oxide, Tissue 3220TI Nortriptyline, Tissue