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 (5) Alcohols (14) Biomarkers (1) Depressants (4) Emetics (4) (-) Gases (1) Hallucinogens (18) Herbicides (3) Hydrocarbons (1) Metals/Elements (84) NPS/Designer Drugs (3) Pesticides/Insecticides (7) Solvents (20) Stimulants (4) Volatiles (31) Test Sub-Category Hydrocarbons (1) Test Test Name 2745B Methane, Blood