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) (2) Gas Chromatography (GC) (2) (-) Gas Chromatography/Mass Spectrometry (GC/MS) (2) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (10) Sample Type (-) Blood (2) Fluid (1) Serum or Plasma (1) Tissue (1) Urine (1) Test Area Therapeutics (2) Test Category (-) Analgesics (1) (-) Anesthetics (1) Antihistamines (1) Sedative/Hypnotics (1) Test Sub-Category Opiates/Opioids (1) Other (1) Test Test Name 3214B Nitrous Oxide, Blood 3990B Propoxyphene and Metabolite, Blood