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) (1) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (1) Sample Type Blood (9) Fluid (2) Serum or Plasma (13) (-) Tissue (2) Urine (3) Test Area Therapeutics (2) Test Category Analgesics (1) (-) Anesthetics (1) Antidepressants (2) (-) Antiepileptics/Antiseizures (1) Antihistamines (1) Antipsychotics (1) Metals/Elements (1) Pesticides/Insecticides (1) Stimulants (2) Volatiles (1) Test Sub-Category Other (2) Test Test Name 3214TI Nitrous Oxide, Tissue 3743TI Phenytoin, Tissue