Nitrate: In inorganic chemistry, a nitrate is a salt of nitric acid with an ion composed of one nitrogen and three oxygen atoms (NO3). In organic chemistry the esters of nitric acid and various alcohols are called nitrates. Nitrogen trioxide is an alternative name for nitrate. ( source )
Nitrite: The nitrite ion is NO2. The anion is bent, being isoelectronic with ozone. More generally, a nitrite compound is either a salt or an ester of nitrous acid. ( source )
WaterWorks™ Nitrate / Nitrite (as Nitrogen) test strips make in-home and field testing for nitrates and nitrites in water a fast, easy process. This product requires no tablets, powders, or counting of drops… making it well-suited for on-site well testing or the occasional testing of drinking water at home.
Each WaterWorks™ Nitrate / Nitrite test strip performs (1) one nitrate test and (1) one nitrate test.
* Dip strip into sample for a period of two seconds
* Remove strip and wait one minute
* Compare developed colors on test pads to color charts on bottle label
Each bottle of WaterWorks™ Nitrate / Nitrite test strips comes with a total of (50) fifty nitrite tests and (50) nitrate tests.
Total Nitrate (NO3): 0, 0.5, 2, 5, 10, 20, 50 ppm (mg/L).
Total Nitrite (NO2): 0.15, 0.3, 1, 1.5, 3, 10 ppm (mg/L)