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) Enzyme Immunoassay (EIA) (1) (-) Gas Chromatography (GC) (3) Gas Chromatography/Mass Spectrometry (GC/MS) (8) Headspace Gas Chromatography (GC) (4) Sample Type Blood (1) Serum or Plasma (1) Urine (1) Test Area Therapeutics (3) Test Category Antidepressants (4) Antihistamines (3) Antimicrobials (4) Antipsychotics (3) Biomarkers (3) Pesticides/Insecticides (5) (-) Sedative/Hypnotics (3) Volatiles (3) Test Sub-Category Barbiturates (3) Test Test Name 0500B Barbital, Blood 0500SP Barbital, Serum/Plasma 0500U Barbital, Urine