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 Gases (1) Test Sub-Category Carboxylic Acids (2) (-) Hydrocarbons (1) Insecticides (3) Macrominerals (2) Organic (4) Organochlorides (1) Other (48) Toxic Elements (11) Trace Elements (6) Test Test Name 2745B Methane, Blood