Chemical Forums
Specialty Chemistry Forums => Chemical Engineering Forum => Topic started by: gas_treater on August 28, 2007, 04:49:55 AM
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Hi, all.
Does anybody have information about laboratory method for measuring ammonia content in the hydrocarbon gas (such as in Sour Water Stripper gas, fuel gas, etc.)? Any information about Laboratory which can be hired to do the analysis is also welcomed.
Thank you very much
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Easily done with gas cromatography (http://en.wikipedia.org/wiki/Gas-liquid_chromatography). Pretty much any lab doing analysis services should have one.
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Yes, a GC method could be used for ammonia measurements. It would involve the use of a thermal conductivity detector which has a poor detection limit for this polar compound (around 0.1% v/v). A GC/MS (or perhaps a flame photometrec detector) would be much better.
Although few labs have a GC with a thermal conductance or flame photometric detector, many have a GC/MS. Good luck finding one that will take a production GC/MS offline to develop and process a few air samples.
But, ion chromatography is quite another story.* You will have to collect your sample on a solid sorbant tube (sulfuric acid-treated silica gel) or in an impinger. The impinger solution should be acidic (most often dilute sulfuric). Many labs do ammonia by IC. Google: laboratory ion chromatography. Look at Intertek.
*See NIOSH Method 6016. This is a clean air method. Modify it for your application. The impinger approach, although clumsy, may be the best solution.
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Hi,
Those all were very helpful information. Thanks a lot.
Regards