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 Carboxylic Acids (1) Cyanide (1) (-) Hydrocarbons (1) Organic (2) Organochlorides (3) Other (65) Sedative-Hypnotics (1) Solvents (1) Toxic Elements (1) Test Test Name 2745B Methane, Blood