Drinking Water Total Oxidized Nitrogen for the Thermo Scientific Gallery Discrete Analyzer offers laboratories a fully automated approach to compliant nitrate and nitrite testing that minimizes the challenges associated with traditional cadmium reduction methods.
Measuring nitrate levels in drinking water is important because, after ingestion, nitrate is reduced to nitrite, which disrupts the blood’s ability to carry oxygen, resulting in methemoglobinemia. Methemoglobinemia is especially serious for infants under the age of six months.2 The U.S. EPA sets the Maximum Contaminant Level (MCL) for nitrate at 10 mg/L. Accurate determination of nitrate concentrations in drinking water requires measurement of the sum of nitrate + nitrite, referred to as total oxidized nitrogen.
Application benefits
• 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
• Automation saves time and reduces errors compared to manual approaches
Goals
• Analyze nitrate + nitrite in drinking water samples using the Thermo Scientific™ Gallery™ and Gallery™ Plus discrete analyzers in compliance with the United States Environmental Protection Agency (U.S. EPA) Safe Drinking Water Act (SDWA).
• Demonstrate that the results obtained using the Gallery discrete analyzer-based automated method correlate well with and meet the QC acceptance criteria in the EPA-approved reference method.
• Analyze spiked surface and tap waters to establish that the Gallery discrete analyzer based automated method is applicable to different types of water samples.
Authors
Meghna Hukeri and Marita Jokinen, Thermo Fisher Scientific
Sponsor:
