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 (GC) (3) Gas Chromatography/Mass Spectrometry (GC/MS) (8) Sample Type Blood (1) Serum or Plasma (1) Urine (1) Test Area (-) Therapeutics (3) Test Category Antidepressants (4) Antihistamines (3) Antimicrobials (4) Antipsychotics (3) (-) Sedative/Hypnotics (3) Test Sub-Category Barbiturates (3) Test Test Name 0500B Barbital, Blood 0500SP Barbital, Serum/Plasma 0500U Barbital, Urine