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) (16) Gas Chromatography/Mass Spectrometry (GC/MS) (1) Headspace Gas Chromatography (GC) (4) (-) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (2) Spectrophotometry (SP) (1) Sample Type Blood (1) Serum or Plasma (1) Test Area Drugs of Abuse (3) (-) Exposure (2) Therapeutics (28) Test Category Pesticides/Insecticides (2) Test Sub-Category Anticoagulants (2) (-) Herbicides (2) Test Test Name 1789B Diquat, Blood 1789SP Diquat, Serum/Plasma