Nitrate plus Nitrite as N - Montana State University
The drinking water standard for nitrite-N is 1.0 mg/L. However, nitrite is very uncommon in groundwater, so it is generally assumed that almost all of the nitrate plus nitrite is in the nitrate form. Natural levels of nitrate-N vary from zero to about 4 mg/L.
1.2 This method covers the determination of nitrite singly, or nitrite and nitrate combined in drinking, ground, surface, domestic and industrial wastes. The applicable range is 0.05-10.0 mg/L nitrate-nitrite nitrogen. The range may be extended with sample dilution.
nitrate plus nitrite (measured as nitrogen). Although extreme levels of nitrate can be associated with central nervous disorders in adults, it should be noted that nitrates and nitrites are rarely a problem in
1.1 This method is used for the determination of nitrate (NO 3 –) plus nitrite (NO 2 –) or nitrite singly in drinking water, groundwater, surface water, saline water, and domestic and industrial waste according to USEPA Method 353.2 (Reference 15.7). 1.2 The Method Detection Limit (MDL) of this method is 0.001 mg/L nitrate plus nitrite ...
• Meets requirements of regulated nitrate + nitrite total oxidized nitrogen methods • Minimizes use of hazardous reagents and their associated costs and safety risks when carrying out nitrate + nitrite methods
• A filtered sample is passed through a column to quantitatively reduce nitrate to nitrite using cadmium metal. Nydahl provides a good discussion of nitrate reduction by cadmium metal. 4 The nitrite (that was originally present plus reduced
analyzed directly without extraction. Nitrate in sample is quantitatively reduced to nitrite by passing the sample through a copper-coated cadmium column. The nitrite (reduced nitrate plus original nitrite) is determined by diazotizing with sulfanilamide dihydrochloride. The remaining water soluble dye has a magneta color which is read at 520 ...
1.1 This method is used to analyze samples of surface, domestic, and industrial water and brines containing from 0.05 to 5.0 mg/L of nitrite- plus nitrate-nitrogen. Samples containing greater concentrations must be diluted. This modified method was implemented in the National Water Quality Laboratory in March 1988.
Cadmium metal reduces nitrate quantitatively to nitrite. Nydahl provides a good discussion of nitrate reduction by cadmium metal. The nitrite formed, in addition to any nitrite originally present in the sample, is diazotized with sulfanilamide and is subsequently coupled with N-(1-naphthyl)ethylenediamine dihydrochloride.
1.1 This test method is applicable to the determination of nitrate plus nitrite (as nitrogen) in surface water, saltwater (saline), ground water, drinking water, wastewater, and any aqueous solution containing nitrate. 1.2 The standard range of …