I want to measure gaseous NH3 emitted from slurry with the gas-analysator G2508 from Picarro. I expect the concentration to be ten and more times higher than the operating range of the gas-analysator (operating range: 0 - 2 ppm). Therefore I want to mix "normal" (clean) air into the NH3-enriched sample air (see sketch attached) to dillute the sample air. Is there any device that can do that?
Thank you very much for your help!
Yours Sincerely
Lisa
Yes, you certainly can. A simple manifold (as shown in your figure) should work and you need to keep the clean air dry because ammonia is very sticky. If budget permits, you should use electronic flow controllers for accurate flow control. There are more advanced ways to dilute your gas analytes. But I don't think you need them.
Xufei Yang thank you very much. You mentioned some really good points. Your answer is really helpful for me :-)
Article Assessment of Ammonia Adsorption onto Teflon and LDPE Tubing...
You have to check losses of ammonia at walls and tubing
see for instance the refrence link for a very "inert" material
glass will adsorb more ammonia
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