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NH3, ammonia
Posted: Mon Aug 26, 2019 7:06 am
by jamaica1953
Help!
How can I measure ammonia <1,5% ?
In stock GH Agilent 7890A
Re: NH3, ammonia
Posted: Mon Aug 26, 2019 11:56 am
by Consumer Products Guy
Titration with acid?
Total nitrogen?
Re: NH3, ammonia
Posted: Mon Aug 26, 2019 11:59 am
by jamaica1953
in the gaseous phase mixed with hydrogen and nitrogen
Re: NH3, ammonia
Posted: Mon Aug 26, 2019 4:07 pm
by James_Ball
What detector do you have?
That will determine how sensitive you are to those analytes to better know the rest of the setup.
Re: NH3, ammonia
Posted: Tue Aug 27, 2019 10:02 am
by jamaica1953
Two katharometers and one flame ionization detector (FID)
Carrier gases for katharometers - nitrogen and helium,
carrier gas for FID - nitrogen
Re: NH3, ammonia
Posted: Tue Aug 27, 2019 6:58 pm
by HPLC chemist
Try using the Bertholet reaction and measuring the color formed on the spectrophotometer.
Re: NH3, ammonia
Posted: Thu Aug 29, 2019 12:01 pm
by jamaica1953
Thanks for the idea!
Re: NH3, ammonia
Posted: Wed Sep 04, 2019 2:23 pm
by AICMM
Jamaica1953,
Replace the FID with an argon ionization detector (full disclosure -it is a product I make.) The IP is perfect for this detector. As an alternative, replace the FID with a PID. Both use the same electronics as the FID, neither will see the balance gases, both will have abundant sensitivity. The PID may have an issue with ammonia on the window, the argon ionization detector will not have this issue (being used for this application in on-line analysis all the time.)
Watch for reactivity with tubing and what not.
Probably more answer than you wanted - my apologies.
AICMM