Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) Enzyme-Linked Immunosorbent Assay (ELISA) (1) Gas Chromatography (GC) (2) (-) Gas Chromatography/Mass Spectrometry (GC/MS) (1) Headspace Gas Chromatography (GC) (9) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (1) Spectrophotometry (SP) (1) Sample Type Blood (1) Test Area Exposure (1) Test Category Acids (3) Alcohols (3) Drugs of Abuse (3) Drugs of Abuse, Therapeutics (1) (-) Gases (1) Industrial/Environmental Toxins (1) Other (1) Solvents (4) Therapeutics (8) Volatiles (11) Test Sub-Category Hydrocarbons (1) Test Test Name 2745B Methane, Blood