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/Mass Spectrometry (GC/MS) (2) Sample Type Blood (1) Tissue (1) Test Area Therapeutics (2) Test Category Analgesics (4) (-) Anesthetics (2) Antihistamines (2) Chemicals (1) Diagnostic Aids (1) Industrial/Environmental Toxins (2) Metals/Elements (2) Pesticides/Insecticides (1) Plasticizers (1) Sedative/Hypnotics (3) Solvents (4) Therapeutics (1) Vasodilators (2) Volatiles (1) Test Sub-Category Other (2) Test Test Name 3214B Nitrous Oxide, Blood 3214TI Nitrous Oxide, Tissue