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) (3) Enzyme-Linked Immunosorbent Assay (ELISA) (1) Gas Chromatography/Mass Spectrometry (GC/MS) (1) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (8) Inductively Coupled Plasma/Mass Spectrometry (ICP/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 4235R Sulfhemoglobin, RBCs