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) (3) (-) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (2) Sample Type Blood (1) Serum or Plasma (1) Test Area Exposure (2) Test Category Antiarrhythmics (2) Anticholinergics (3) Antihistamines (5) Antitussives/Cough Suppressants (10) Cholinesterase Inhibitors (3) Diuretics (4) Drugs of Abuse (3) (-) Pesticides/Insecticides (2) Potassium Channel Blockers (2) Test Sub-Category (-) Herbicides (2) Test Test Name 1789B Diquat, Blood 1789SP Diquat, Serum/Plasma