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 (5) Serum or Plasma (2) (-) Tissue (2) Urine (4) Test Area Therapeutics (2) Test Category Analgesics (1) (-) Anesthetics (1) (-) Antidepressants (1) Metals/Elements (2) Stimulants (2) Test Sub-Category Other (1) Tricyclic (1) Test Test Name 3214TI Nitrous Oxide, Tissue 3220TI Nortriptyline, Tissue