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) Serum or Plasma (1) Urine (2) Test Area Exposure (1) Test Category Acids (2) Alcohols (8) Antiepileptics/Antiseizures (1) Biomarkers (3) Depressants (3) Diagnostic Aids (1) Drugs of Abuse (6) Drugs of Abuse, Therapeutics (2) Exposure (1) (-) Gases (1) Metals/Elements (1) NPS/Designer Drugs (1) Other (6) Perfluorinated Compounds (1) Pesticides/Insecticides (2) Sedative/Hypnotics (2) Solvents (17) Terpenes (2) Therapeutics (5) Volatiles (36) Test Sub-Category Hydrocarbons (1) Test Test Name 2745B Methane, Blood