Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) Gas Chromatography (GC) (1) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (6) (-) Spectrophotometry (SP) (1) Sample Type Blood (1) Test Area Exposure (1) Test Category (-) Biomarkers (1) Test Sub-Category Other (1) Test Test Name 2887B Methemoglobin, Blood