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) (1) High Performance Liquid Chromatography/Tandem Mass Spectrometry (LC-MS/MS) (4) (-) Spectrophotometry (SP) (2) Sample Type Blood (1) RBCs (1) Test Area Exposure (2) Test Category Acids (3) Alcohols (3) Antidepressants (4) Antiepileptics/Antiseizures (3) Antihistamines (2) Antipsychotics (3) (-) Biomarkers (2) Cholinesterase Inhibitors (3) Other (1) Solvents (4) Terpenes (3) Volatiles (4) Test Sub-Category (-) Other (2) Test Test Name 4235B Sulfhemoglobin, Blood 4235R Sulfhemoglobin, RBCs