Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) (-) Enzyme-Linked Immunosorbent Assay (ELISA) (1) Gas Chromatography (GC) (3) (-) Gas Chromatography/Mass Spectrometry (GC/MS) (1) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (6) Inductively Coupled Plasma/Mass Spectrometry (ICP/MS) (1) Sample Type Blood (7) Fluid (3) Serum or Plasma (6) (-) Tissue (2) Urine (4) Test Area Therapeutics (2) Test Category Analgesics (1) Anesthetics (1) Test Sub-Category Opiates/Opioids (1) Other (1) Test Test Name 3214TI Nitrous Oxide, Tissue 3236TI Opiates Screen, Tissue