Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) High Performance Liquid Chromatography/Tandem Mass Spectrometry (LC-MS/MS) (2) (-) Spectrophotometry (SP) (1) Sample Type (-) Blood (1) RBCs (1) Test Area Exposure (1) Test Category (-) Biomarkers (1) Test Sub-Category Other (1) Test Test Name 4235B Sulfhemoglobin, Blood