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 Serum or Plasma (1) (-) Urine (1) Test Area (-) Exposure (1) Test Category Pesticides/Insecticides (1) Test Sub-Category Alcohols (3) (-) Avicides (1) Barbiturates (1) Benzodiazepines (1) Cannabinoids (1) Cocaine (1) Designer Benzodiazepines (1) Hallucinogens (2) Herbicides (1) Hydrocarbons (1) Opiates/Opioids (3) Other (10) Solvents (1) Toxic Elements (10) Test Test Name 0276U 4-Aminopyridine Exposure, Urine