Currently working on electrochemical reduction of N2 to NH3 and want to exercise proper control to reduce ambient NH3 and NOx in the experimental set-up.
While using 99% purity N2 and Ar gas, there are still literature sources that point out there are still trace impurities in the gas streams.
How can I detect these impurities? Would Nessler's reagent or indophenol method work (though I know this would work with NH3 but am unsure with NOx)?
Really would appreciate insight into this.
Jan Socha , Yes, indeed I would like to measure the amount of these impurities. Would it be possible to measure this in-situ during flow injection? Or would samples of the gas stream be needed to quantify the impurities?
As usual possibility of using method depends on concentration of NOx and NH3 I think that mass spectrometer will allow you check on-line the quality of gas. Of course you have to run appropriate calibration. Remember that it can be a problem with determination ammonia in presence of water. You can take a look on spectrometers which are usually connected with microreactors for research in catalysts activity.
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