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) (1) Gas Chromatography/Mass Spectrometry (GC/MS) (3) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (2) Sample Type Blood (1) Serum or Plasma (1) (-) Urine (1) Test Area Therapeutics (1) Test Category Antihistamines (1) (-) Sedative/Hypnotics (1) Volatiles (2) Test Sub-Category Barbiturates (1) Test Test Name 0500U Barbital, Urine