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 (1) (-) Hydrocarbons (1) Macrominerals (1) Metals/Elements (1) Other (17) Selective Serotonin Reuptake Inhibitors (SSRI) (1) Toxic Elements (5) Trace Elements (1) Test Test Name 2745B Methane, Blood