For samples with very high Nitrite concentrations - ideal for monitoring Nitrite concentrations during the Anaerobic Ammonium Oxidation (Anammox) process. Nitrite TNTplus chemistry and your Hach spectrophotometer are engineered to simplify water analysis for accurate results, everytime. For determination of very high Nitrite concentrations, e.g. in centrate, filtrate or press water by the Diazotization method. With Nitrite TNTplus reagents, simply add sample and add the Dosicap zip reagent, shake the vial and insert into your Hach spectrophotometer! The Direct Read Technology will provide your Nitrite results in mg/L. No more sample dilutions, cleaning glassware, dealing with large amounts of waste, and worrying about human errors.25 Nitrite vials per box.