Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) Colorimetry (C) (1) Enzyme-Linked Immunosorbent Assay (ELISA) (15) Enzyme Immunoassay (EIA) (3) Gas Chromatography (GC) (28) Headspace Gas Chromatography (GC) (10) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (14) (-) High Performance Liquid Chromatography/Tandem Mass Spectrometry (LC-MS/MS) (2) High Performance Liquid Chromatography/Time of Flight-Mass Spectrometry (LC/TOF-MS) (15) Inductively Coupled Plasma/Mass Spectrometry (ICP/MS) (3) Sample Type Blood (1) Serum or Plasma (1) Test Area Therapeutics (2) Test Category Antithrombotics (2) Test Sub-Category Anticoagulants (2) Test Test Name 4800B Warfarin, Blood 4800SP Warfarin, Serum/Plasma