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 (3) Analgesics (5) Anesthetics (2) Antiarrhythmics (5) Anticholinergics (3) Antidepressants (6) Antidiabetics (4) Antiepileptics/Antiseizures (14) Antihistamines (7) Antineoplastics (2) Antipsychotics (11) Appetite Suppressants (3) Chemicals (1) Hallucinogens (4) Herbicides (3) Immunosuppressants (3) Industrial/Environmental Toxins (2) Metals/Elements (9) Muscle Relaxants (3) NPS/Designer Drugs (1) Opiate/Opioid Antagonists (7) Other (3) Perfluorinated Compounds (4) Pesticides/Insecticides (4) Plasticizers (1) Solvents (5) Stimulants (7) Terpenes (1) (-) Therapeutics (1) Vasodilators (4) Volatiles (11) Test Sub-Category (-) Other (1) Test Test Name 3174SP Nitrate/Nitrite (Qualitative), Serum/Plasma