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/Mass Spectrometry (GC/MS) (1) Sample Type (-) Blood (1) Test Area Exposure (1) Test Category Acids (1) Alcohols (1) Antianxiety (1) Antidepressants (1) (-) Gases (1) Sedative/Hypnotics (2) Solvents (1) Volatiles (5) Test Sub-Category Hydrocarbons (1) Test Test Name 2745B Methane, Blood