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 Anesthetics (2) Antidepressants (11) Antidiabetics (2) Industrial/Environmental Toxins (2) Metals/Elements (1) NPS/Designer Drugs (5) Opiate/Opioid Antagonists (7) Other (1) Solvents (3) Stimulants (8) (-) Therapeutics (1) Vasodilators (2) Test Sub-Category (-) Other (1) Test Test Name 3174SP Nitrate/Nitrite (Qualitative), Serum/Plasma