I am using always the spectrometer sw for this purpose. If you have exported data only, you may try this, but I have not worked with it..

http://www.originlab.com/index.aspx?go=Solutions/Applications/Spectroscopy

There are two ways to do the baseline correction, one is to use the software provided along with the instrument by manufacturer or use some software like origin can be useful for this purpose.

Having plotted and looked at the spectrum what do you hope to achieve by applying a baseline correction ? The low transmittance and background slope is indicative of carbon filler often used in rubbers. The band shape showing the Christiansen effect suggest highly crystalline particles are present. Removing the background will still give you a spectrum which will be full of distorted band shapes

During your sample analysis when you get your final FT-IR spectra then you can make base line correction with in the FT-IR software. Ask the technician this is very simple. Or you can export your data in txt file in origin  and plot a spectra, here also you can make some corrections. But i think you can do this easily with in the FT-IR software.

Mr. Hernandez,

Please find back your file (attachment) with an added BL-corrected data as independent x/y columns.

Looking at the above background corrected file which has worked well shows :-

"Removing the background will still give you a spectrum which will be full of distorted band shapes."

It does and some scepticism should be given as which are real bands

Thanks to all for the help.

The reason I need to learn about the FTIR is because I am working with rubber and must found the tramitances that has the double bond C = C, the C - S and the C - Cl.

Therefore, I need to know the wavenumber of them.

Anyone have information about that?

There is strong Christiansen effect, generally. Most probably the number of scans is small; the particle size is not homogeneously distributed and/or the KBR-pellet is not so transparent!?

origin software can be used to do baselining. Even better and user friendly is omics software from thermo fisher. I have carried out base lining of ftir spectra of bone samples and found omics software to be even better than origin. For curve fitting of samples, one can use igor sofware.

Dear Bojidarka B. Ivanova , please could you inform which software you've used to get this baseline correction? Thanks

Please see this video

How to Correct Baseline in Origin

https://www.youtube.com/watch?v=sUi_0jWKDWs

Hi Abhay,

Unfortunately, that is very complicated, the spectrometer software should be more user friendly. But, fortunately, there is a free solution for out of the spectrometer computer working..

Try Spectragryph, which has a full-functional demo, regularly updated (and the demo period restarts) and you can follow what you do live. You can import directly the most common spectrometer software generated files and the publication quality figures can be created easily. Additionally, not only the baseline correction but many other useful spectrum manipulation tool can be accessed in one click. It can handle UV and fluorimetric spectra, too.

Not foolproof but easy to use. Because it is using an own format, your original files remain intact.

For correcting the baseline in FTIR-ATR, it is necessary to click on "Auto baseline"in the menu bar of the software "OMNIC", as soon as the test is finished.

The method is common and the same for almost all data. It is very much easy in Origin software. Check out this tutorial link

https://www.youtube.com/watch?v=3ij7blBQ0SQ