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) Impairment (6) Postmortem (9) Test Category Acids (6) Alcohols (18) Biomarkers (8) Chemicals (1) Depressants (2) (-) Gases (1) Industrial/Environmental Toxins (3) Metals/Elements (3) Other (7) Perfluorinated Compounds (2) Pesticides/Insecticides (6) Solvents (46) Terpenes (4) Volatiles (74) Test Sub-Category Hydrocarbons (1) Test Test Name 2745B Methane, Blood