DISCRETE ANALYZER CHEMISTRY Nitrate/Nitrite (Cadmium Coil) Method
Methods Referenced • SEAL Analytical AQ400 Method EPA-126-C Rev. 2
• EPA Method 353.2 Rev 2.0 • Standard Methods 4500-NO 3 - F
This method covers the determination of Nitrate-N and Nitrite-N in sewage and effluents, raw and finished drinking waters, and industrial wastes. Method Range 0.04 – 5.0 mg N/L We recommend ICNNO31 and ICNNO21 to make your standards and reduction efficiency check solutions for this method. These solutions are already certified as Nitrate or Nitrite as Nitrogen, so no conversions are needed, just simple dilution factors to get these diluted to your working concentrations. Reagent Composition Two Reagents are used for the Nitrate+Nitrite Cadmium Coil method: Reagent 1: SEALAnalyticalAQ NOx Cad-Buffer – Working Buffer Reagent in DI Water: 179.1 g/L Ammonium Chloride 1.99 g/L EDTA Disodium Salt Dihydrate 0.3731 g/L Triton X-100 Ammonium Hydroxide for pH adjustment Reagent 2: SEALAnalyticalAQ NOx Cad-Color – Sulfanilamide-NEDD Reagent in DI Water: 2 g/L NaOH 15 g/L Sulfanilamide 0.75 g/L N-(1-naphthyl)-ethylenediamine dihydrochloride 4% v/v Phosphoric Acid
For more information, contact EMAIL: inform@seal-us.com PHONE: (262) 241-7900 WEBSITE: seal-analytical.com
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