Ftnir Log Out | Topics | Search
Moderators | Register | Edit Profile

NIR Discussion Forum » Bruce Campbell's List » I need help » Ftnir « Previous Next »

Author Message
Top of pagePrevious messageNext messageBottom of page Link to this message

Tony Davies (Td)
Moderator
Username: Td

Post Number: 124
Registered: 1-2001
Posted on Tuesday, April 04, 2006 - 4:27 am:   

Hello Manuel,

I think MPDC intended to say that an FTNIR spectrum is one that has been obtained by an FTNIR spectrometer. This means that the x-axis will be in wavenumbers (cm-1) rather than wavelength (usually nm). It is possible to convert from one to the other but as a general rule it is safer to use the original data.

While it is true that you can obtain an FTNIR spectrum by modifying an FTIR spectrometer this will be of little use. FTNIR instruments are optimised for the NIR region and you need this optimisation to obtain the benefits of NIR analysis.
Just to add to the confusion; in the literature you will find papers dealing with the use of FT for processing NIR (wavelength data), which was introduced by Fred McClure. This is part of chemometrics and is not related to the instrument.
Best wishes,
Tony
Top of pagePrevious messageNext messageBottom of page Link to this message

MPDC (Unregistered Guest)
Unregistered guest
Posted on Monday, April 03, 2006 - 4:03 am:   

ftnir is just a NIR spectrum obtained with a FTIR instrument. Most FTIR instruments can also do NIR provided you mount the correct source, beamsplitter and detector. The instrument software will convert the interferogram to an absorption spectrum.
Top of pagePrevious messageNext messageBottom of page Link to this message

manuel (Manuel)
New member
Username: Manuel

Post Number: 1
Registered: 3-2006
Posted on Friday, March 31, 2006 - 11:35 am:   

hi!

what is ftnir? if you have a nir absorbance spectroscopy how could you solve for the ftnir?

is there any software available for free download?

thanks!

Add Your Message Here
Posting is currently disabled in this topic. Contact your discussion moderator for more information.