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 (GC) (1) (-) Gas Chromatography/Mass Spectrometry (GC/MS) (2) Sample Type (-) Blood (2) Serum or Plasma (1) Urine (1) Test Area Exposure (2) Test Category (-) Acids (1) Alcohols (1) Drugs of Abuse (1) (-) Gases (1) Other (1) Solvents (1) Therapeutics (2) Volatiles (5) Test Sub-Category Carboxylic Acids (1) Hydrocarbons (1) Test Test Name 2134B Formic Acid, Blood 2745B Methane, Blood