Sciencemadness Discussion Board

FT-IR spectrum

aeacfm - 26-10-2010 at 22:32

1- while Browsing the new FT-IR (Bruker tensor 27 ) installed in our lab i find option to perform from 1to 5 th derivatives of the spectrum ?

do any body deal with that ? if yes what is its applications ?

2- also there is spectrum normalization in different ways like min max normaliztion , vector normalization , offset normalization my question is : Is this normalization what we studied in quantum mechanics and spectroscopy or it is some thing different ?
thanks in advance

Nicodem - 27-10-2010 at 09:11

1. You can use second and further derivatives of the graph to better pinpoint the peaks and their width. This is generally not useful for substance characterization, but can be of use when you are following a reaction using IR. In this case it is important to exactly mark the peak from its start to the end so that the area under the peak is representative.

2. Normalization usually means to make some data more representative and comparable. For example, normalizing two spectra on a specified factor makes them comparable on other factors as well. But it can also simply be about cosmetic changes to the spectra (intensity, baseline correction, etc.). Certainly this software option has nothing to do with any quantum mechanics.

aeacfm - 28-10-2010 at 04:33

Quote: Originally posted by Nicodem  

2. Normalization usually means to make some data more representative and comparable. For example, normalizing two spectra on a specified factor makes them comparable on other factors as well. But it can also simply be about cosmetic changes to the spectra (intensity, baseline correction, etc.). Certainly this software option has nothing to do with any quantum mechanics.


thank you alot for your experienced reply

but there some thing that the equation of the vector normalization is quiet like the normalization of the wave function