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) (1) (-) Gas Chromatography (GC) (2) Gas Chromatography/Mass Spectrometry (GC/MS) (3) Headspace Gas Chromatography (GC) (1) Sample Type (-) Blood (2) Serum or Plasma (1) Urine (3) Test Area Exposure (1) Therapeutics (1) Test Category Alcohols (1) Antihistamines (2) (-) Sedative/Hypnotics (1) (-) Volatiles (1) Test Sub-Category Barbiturates (1) Other (1) Test Test Name 0500B Barbital, Blood 0835B Butane and Isobutane, Blood