EPA lists 38 approved nitrate methods in its EPA 815-B-16-014 Methods document. Most are overlapping. I have no idea which Evirolyzer uses. If they won't help you get another one.
Published by Joseph Cotruvo, President at Joseph Cotruvo & Associates, Water , Environment and Public Health
EPA lists 38 approved nitrate methods in its EPA 815-B-16-014 Methods document. Most are overlapping. I have no idea which Evirolyzer uses. If they won't help you get another one.