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 (3) Alcohols (10) Antianxiety (3) Antidepressants (5) Biomarkers (4) (-) Gases (1) Metals/Elements (2) Sedative/Hypnotics (5) Solvents (7) Volatiles (22) Test Sub-Category Hydrocarbons (1) Test Test Name 2745B Methane, Blood