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) Urine (4) Test Area Drugs of Abuse (3) (-) Exposure (1) Therapeutics (5) Test Category Industrial/Environmental Toxins (1) Therapeutics (1) Vasodilators (1) Test Sub-Category (-) Other (1) Toxic Elements (2) Test Test Name 3174SP Nitrate/Nitrite (Qualitative), Serum/Plasma