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) (1) Sample Type (-) Serum or Plasma (1) Test Area Exposure (1) Test Category Alcohols (1) Analgesics (1) Antiarrhythmics (3) Anticholinergics (1) Antidepressants (1) Antidiabetics (2) Antiepileptics/Antiseizures (7) Antihistamines (2) Antineoplastics (1) Antipsychotics (4) Appetite Suppressants (1) Chemicals (1) Hallucinogens (1) Herbicides (2) Immunosuppressants (1) Industrial/Environmental Toxins (1) Metals/Elements (1) Muscle Relaxants (1) Opiate/Opioid Antagonists (2) Other (2) Perfluorinated Compounds (3) Pesticides/Insecticides (2) Stimulants (2) (-) Therapeutics (1) Vasodilators (2) Volatiles (3) Test Sub-Category (-) Other (1) Test Test Name 3174SP Nitrate/Nitrite (Qualitative), Serum/Plasma