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) (12) Gas Chromatography/Mass Spectrometry (GC/MS) (2) Headspace Gas Chromatography (GC) (4) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (44) High Performance Liquid Chromatography/Tandem Mass Spectrometry (LC-MS/MS) (1) (-) 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