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) Urine (1) Test Area (-) Exposure (1) Test Category Gases (1) Test Sub-Category Aromatics (2) Carboxylic Acids (2) Cyanide (2) (-) Hydrocarbons (1) Organic (4) Organochlorides (4) Other (97) Sedative-Hypnotics (2) Solvents (2) Toxic Elements (2) Test Test Name 2745B Methane, Blood