Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) Inductively Coupled Plasma/Mass Spectrometry (ICP/MS) (4) (-) Spectrophotometry (SP) (1) Sample Type Blood (6) (-) RBCs (1) Serum or Plasma (7) Urine (3) Test Area Exposure (1) Test Category Biomarkers (1) Test Sub-Category Other (1) Test Test Name 4235R Sulfhemoglobin, RBCs