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) (1) Headspace Gas Chromatography (GC) (1) Sample Type (-) Blood (2) Tissue (1) Urine (3) Test Area Drugs of Abuse (1) (-) Exposure (2) Test Category Alcohols (2) Antithrombotics (1) Metals/Elements (5) (-) Volatiles (2) Test Sub-Category Other (2) Test Test Name 0541B Benzene, Blood 0835B Butane and Isobutane, Blood