Determination of Nitrogen Oxide Emissions from Stationary Sources
A grab sample is collected in an evacuated flask containing a dilute sulfuric acid-hydrogen
peroxide absorbing solution, and the nitrogen oxides, except nitrous oxide, are measured
colorimetrically using the phenoldisulfonic acid (PDS) procedure.
For more information and documents about Method 7, please consult the EPA's Method 7 webpage.
Apex Instruments offers a Method 7 Sampling Kit. If interested in Method 7 sampling, Apex Instruments works with our customers to make sure we are providing the correct products for your project and will provide you with a price quote. For any questions about our sampling kit, please contact sales@apexinst.com.