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) Inductively Coupled Plasma/Optical Emission Spectrometry (ICP/OES) (1) Sample Type 24 Hour Urine (5) Blood (45) Fluid (2) Hair (18) Nails (11) RBCs (20) Serum or Plasma (47) Stool (2) (-) Tissue (1) Urine (47) Test Area Test Category Test Sub-Category Test Test Name 1006TI Carbon Monoxide - Iron Ratio Profile, Tissue