Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) Enzyme-Linked Immunosorbent Assay (ELISA) (1) (-) Gas Chromatography (GC) (3) Headspace Gas Chromatography (GC) (1) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (1) Spectrophotometry (SP) (1) Sample Type Blood (1) Serum or Plasma (1) Urine (1) Test Area Exposure (3) Test Category Alcohols (3) Analgesics (9) Anesthetics (4) Anticholinergics (3) Antidepressants (7) Antiepileptics/Antiseizures (6) Antihistamines (1) Antimicrobials (2) Cholinesterase Inhibitors (3) Pesticides/Insecticides (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