Water Conditioning Nitrate
Nitrate is measured in drinking water. The EPA has a maximum contaminant level 10 mg/L limit of Nitrate as Nitrogen (NO3-N). Similarly, the World’s Health Organization has a limit of 50 mg/L Nitrate (NO3-) in drinking water. Both values are close with the difference being the chemical form. 50 mg/L Nitrate is equivalent to 11.29 mg/L as Nitrate-Nitrogen. Nitrate is monitored due to the effect it has on the oxygen carrying capacity of blood. In infants, if formula is prepared with water that has a high level of nitrates then this can be toxic due to the conversion of nitrate to nitrite. The nitrite reacts with iron in hemoglobin to form methemoglobin. The methemoglobin reduces the blood capacity to carry oxygen resulting in a blue discoloration known as Blue Baby Syndrome or methemoglobinemia.
Hanna offers a variety of products to measure nitrate in water. These include benchtop and portable photometers. Also available are chemical test kits (CTKs).
Below are the most common products used in water conditioning.
Chemical Test Kits