Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) Enzyme Immunoassay (EIA) (1) Gas Chromatography (GC) (8) (-) Gas Chromatography/Mass Spectrometry (GC/MS) (2) Headspace Gas Chromatography (GC) (1) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (26) High Performance Liquid Chromatography/Tandem Mass Spectrometry (LC-MS/MS) (1) Sample Type Blood (4) Fluid (1) Serum or Plasma (3) Tissue (1) (-) Urine (2) Test Area Exposure (2) (-) Therapeutics (2) Test Category Analgesics (1) Sedative/Hypnotics (1) Test Sub-Category Barbiturates (1) Opiates/Opioids (1) Test Test Name 3410U Pentobarbital, Urine 3990U Propoxyphene and Metabolite, Urine