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 Exposure (2) Test Category Anesthetics (1) Antianxiety (1) Anticholinergics (1) Antidepressants (2) Antiepileptics/Antiseizures (1) Antihistamines (2) Antitussives/Cough Suppressants (1) Diuretics (1) Muscle Relaxants (1) (-) Volatiles (2) Test Sub-Category (-) Other (2) Test Test Name 0541B Benzene, Blood 0835B Butane and Isobutane, Blood