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) (7) Gas Chromatography (GC) (33) Gas Chromatography/Mass Spectrometry (GC/MS) (3) Headspace Gas Chromatography (GC) (7) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (121) High Performance Liquid Chromatography/Tandem Mass Spectrometry (LC-MS/MS) (5) Inductively Coupled Plasma/Mass Spectrometry (ICP/MS) (2) (-) Spectrophotometry (SP) (2) Sample Type Blood (1) RBCs (1) Test Area Exposure (2) Test Category Biomarkers (2) Test Sub-Category Antibiotics (1) (-) Other (2) Test Test Name 4235B Sulfhemoglobin, Blood 4235R Sulfhemoglobin, RBCs