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 (10) Biomarkers (5) Chemicals (1) Depressants (2) (-) Gases (1) Metals/Elements (2) Other (5) Perfluorinated Compounds (4) Pesticides/Insecticides (4) Solvents (28) Terpenes (2) Volatiles (47) Test Sub-Category Hydrocarbons (1) Test Test Name 2745B Methane, Blood