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) Test Category Analgesics (7) Antianxiety (2) Antidepressants (6) Antidiabetics (1) Antihypertensives (3) Industrial/Environmental Toxins (1) Metals/Elements (3) NPS/Designer Drugs (6) Opiate/Opioid Antagonists (5) Other (1) Sedative/Hypnotics (3) Solvents (3) Stimulants (4) Therapeutics (1) (-) Vasodilators (1) Test Sub-Category Other (1) Test Test Name 3174SP Nitrate/Nitrite (Qualitative), Serum/Plasma