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 (6) Alcohols (19) Biomarkers (8) Chemicals (1) Depressants (10) Drugs of Abuse, Therapeutics (10) (-) Gases (1) Industrial/Environmental Toxins (2) Metals/Elements (3) Other (6) Perfluorinated Compounds (4) Pesticides/Insecticides (6) Solvents (46) Terpenes (2) Volatiles (75) Test Sub-Category Hydrocarbons (1) Test Test Name 2745B Methane, Blood