Method Validations

for regulatory nitrate-n analysis

METHOD VALIDATIONS

EPA
ASTM
USGS

the nelac institute method codes

METHOD CODEMETHOD REFERENCEREVISION DATEMETHOD TITLEOFFICIAL METHOD TITLE
 40005285 USGS I-2547-11 2011 Standard Level Colorimetric Determination of Nitrate plus Nitrite by Enzymatic Reduction, Automated Discrete Analyzer MethodStandard Level Colorimetric Determination of Nitrate plus Nitrite by Enzymatic Reduction, Automated Discrete Analyzer Method
 40005296 USGS I-2548-11 2011 Low-Level Colorimetric Determination of Nitrate plus Nitrite by Enzymatic Reduction, Automated Discrete Analyzer Method. Low-Level Colorimetric Determination of Nitrate plus Nitrite by Enzymatic Reduction, Automated Discrete Analyzer Method
 30034107  ASTM D7781-14  2014 Nitrate-Nitrite in Water by Nitrate ReductaseStandard Test Method for Nitrate-Nitrite in Water by Nitrate Reductase
 Coming Soon EPA N07-0003 Anticipated 2017 Nitrate Reductase Nitrate-Nitrogen AnalysisDetermination of Nitrate plus Nitrite by Enzymatic Reduction, Automated Discrete Analyzer Method 

nitrate-nitrogen analysis using nitrate reductase

EPA CASE N07-0003

Federal Register

ATP Letter

EPA Method

IMPORTANT LINKS & DOCUMENTS

U.S. EPA
ASTM International
U.S. Geological Survey

epa method validation

PROGRESS TIMELINE

EPA Approval Timeline