Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) High Performance Liquid Chromatography/Tandem Mass Spectrometry (LC-MS/MS) (1) Sample Type Blood (1) RBCs (1) (-) Serum or Plasma (1) Test Area Exposure (1) Test Category Analgesics (2) Antiarrhythmics (1) Anticholinergics (2) Antiepileptics/Antiseizures (1) Antimigraines (1) Antiparkinsons (1) (-) Biomarkers (1) Opiates/Opioids (1) Pesticides/Insecticides (1) Sedative/Hypnotics (2) Vasodilators (1) Volatiles (1) Test Sub-Category (-) Other (1) Stimulants (1) Synthetic Cannabinoids (1) Test Test Name 4239SP Sulfide Exposure Biouptake Marker, Serum/Plasma