US EPA Method 7D, 7E

Method 7D

Determination of Nitrogen oxide Emissions from Stationary Sources (Alkaline-Permanganate/Ion Chromatographic Method)

This method applies to the measurement of NOX emissions from fossil-fuel fired steam generators, electric utility plants, nitric acid plants, or other sources as specified in the regulations.

Method 7E

Determination of NOX in Stack Gas, (Instrumental Analyzer Procedure)

Method 7E is a procedure for measuring nitrogen oxides (NOX) in stationary source emissions using a continuous instrumental analyzer.