Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) Enzyme-Linked Immunosorbent Assay (ELISA) (1) Gas Chromatography/Mass Spectrometry (GC/MS) (1) Headspace Gas Chromatography (GC) (1) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (11) (-) Spectrophotometry (SP) (1) Sample Type (-) Blood (1) RBCs (1) Urine (2) Test Area Exposure (1) Test Category Biomarkers (1) Test Sub-Category (-) Other (1) Toxic Elements (2) Trace Elements (1) Test Test Name 4235B Sulfhemoglobin, Blood