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) (6) Enzyme-Linked Immunosorbent Assay (ELISA) (14) Enzyme Immunoassay (EIA) (3) (-) Gas Chromatography (GC) (3) Gas Chromatography/Mass Spectrometry (GC/MS) (9) Headspace Gas Chromatography (GC) (10) High Performance Liquid Chromatography/Time of Flight-Mass Spectrometry (LC/TOF-MS) (5) Sample Type Blood (1) Serum or Plasma (1) Urine (1) Test Area Exposure (3) Test Category Alcohols (3) Analgesics (3) Anticholinergics (3) Antiepileptics/Antiseizures (1) Antihistamines (1) Cholinesterase Inhibitors (3) (-) Solvents (3) Vasodilators (3) Volatiles (9) Test Sub-Category (-) Other (3) Test Test Name 4030B Pyridine, Blood 4030SP Pyridine, Serum/Plasma 4030U Pyridine, Urine