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 (-) Blood (1) Serum or Plasma (1) Test Area Exposure (1) Therapeutics (1) Test Category Analgesics (3) Anesthetics (2) Antianxiety (1) Antidepressants (5) Antidiabetics (1) Antihypertensives (2) (-) Industrial/Environmental Toxins (1) Metals/Elements (2) NPS/Designer Drugs (5) Opiate/Opioid Antagonists (2) Sedative/Hypnotics (2) Stimulants (3) (-) Vasodilators (1) Test Sub-Category Other (1) Test Test Name 3174B Nitrate/Nitrite (Qualitative), Blood (Forensic)