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 (9) Serum or Plasma (6) (-) Tissue (2) Urine (7) Test Area Drugs of Abuse (1) (-) 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