EPA Method 7D

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EPA Method 7D:
DETERMINATION OF NITROGEN OXIDE EMISSIONS FROM STATIONARY SOURCES (ALKALINE-PERMANGANATE/ION CHROMATOGRAPHIC METHOD)

Summary:
An integrated gas sample is extracted from the stack and passed through impingers containing an alkalinepotassium permanganate solution; NOx (NO + NO2) emissions are oxidized to NO3 -. Then NO3 - is analyzed by ion chromatography.

Scope:
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.

Date Issued:
9/25/1996