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 (4) Alcohols (15) Antiepileptics/Antiseizures (2) Biomarkers (7) Chemicals (1) Depressants (6) Diagnostic Aids (1) Drugs of Abuse (8) Drugs of Abuse, Therapeutics (4) Exposure (1) (-) Gases (1) Industrial/Environmental Toxins (1) Metals/Elements (2) NPS/Designer Drugs (1) Other (6) Perfluorinated Compounds (2) Pesticides/Insecticides (4) Sedative/Hypnotics (4) Solvents (28) Terpenes (3) Therapeutics (7) Volatiles (48) Test Sub-Category Hydrocarbons (1) Test Test Name 2745B Methane, Blood