Method 353.4: Determination of Nitrate and Nitrite in Estuarine and Coastal Waters by Gas Segmented Continuous Flow Colorimetric Analysis

Original publisher: [Cincinnati, OH] : United States Environmental Protection Agency, Office of Research and Development, National Exposure Research Laboratory, [1997] OCLC Number: (OCoLC)65212638 Subject: Water quality -- Government policy -- United States. Excerpt: ... 17.0 Tables, Diagrams, Flowcharts, and Validation Data Debubbler 0.41 To Waste 0.41 Detector 540nm 10 0.10 NED 9 8 Sulfanilamide 0.10 To Waste 7 6 0.32 Sample 5 4 OTCR Nitrogen 0.25 3 Buffer 1.12 2 1 Reagent Water Manifold or Low Nutrient Seawater 1.57 Wash To Sampler Pump Sample:Wash = 60 ": 30 " mL / min Figure 1. Manifold configuration for nitrate + nitrite analysis using an Open Tubular Cadmium Reactor. Revision 2.0 September 1997 353.4-15