I setup the calibration factor when I use NH3 and I have two peak but when I go to the report it give me 0 and the amount gas adsorbed 0.00000. Can anyone explain to me why it happened like that?
I modify activated carbon
I run it with out sample there is no peaks and I run it with out NH3 also there is no peaks
sorry prof. this problem its only with this sample I do not know why
I run another sample its okey
The calibration factor is 0, so the result is always 0 regardless of the area that you report analysis. The calibration factor must be defined prior to analysis, or perform then manual calculation. Usually this calibration is done by titration of NH3 collected at the outlet of the team with an acid, usually boric acid or by injection of a known volume of NH3 to measure the response of the team and thus calibrate the response factor.
Furthermore, you must be careful with the first sign may be water at low temperature to which is, or may be the result of physical adsorption.
What equipment are you using for measurements?
Thank you prof. Fernando Aguirre and prof. Giuseppe Trunfio
How can I do the manual calculation?
the equipment is Thermo Finnigan TPDRO 1100 series
With an empty reactor, you need to inject known amounts of NH3 and measure the response on the computer, the factor should be a relationship between the amount in moles or millimoles or micromoles and the area of the curve that occurs in response. If you can not inject quantities of ammonia, you can place a sample and perform an analysis, putting the team's departure a trap for NH3, for example, an exact volume of a boric acid solution of known concentration and then titrate the acid no reacted. By this you know the amount of ammonia that caused the signal equipment and can obtain a relation between response area and molar amount of ammonia.
Do you have any videos or introduction book teaching how to use TPDRO- ammonia, I mean how to set up, connect the system, and check how is it working!? thanks alot
Hi Hieu Do Trung I don't have videos, if you have access to Paul Webb's book, Analytical Methods in Fine Particle Technology, it would be very helpful.
Hieu Do Trung The analysis will take almost 5 hours and 30 min. its difficult to record a video. I will write the method here later by tomorrow.
If the problem lies in the particular sample, please check for the sample preparation and if not then see instrument parameters. Also you need to define the calibration factor.
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