Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) Chemistry Analyzer (1) (-) Gas Chromatography/Mass Spectrometry (GC/MS) (1) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (2) Sample Type Blood (1) Test Area Exposure (1) Test Category Acids (3) Alcohols (3) Antianxiety (3) Antidepressants (5) (-) Gases (1) Sedative/Hypnotics (5) Solvents (2) Volatiles (8) Test Sub-Category Hydrocarbons (1) Test Test Name 2745B Methane, Blood