FT-IR (Nicolet)

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Model

Thermo Nicolet Nexus 470 FT-IR

User manual : http://mmrc.caltech.edu/FTIR/Nicolet/Nicolet%20Software/Nicolet%202/4700_6700_User.pdf

Operating Instructions

Solid Samples

  • Open OMNIC software
  • Clean the instrument with ethanol and a KimWipe
  • Collect background data with sample holder screwed down (Col Bkg)
  • Place sample and screw down the sample holder
  • Col Sample (Col Sam)
  • Delete background data by clicking on the background spectrum and hitting the "Clear" Button
  • Save sample as a .csv file onto a flash drive to export

~OR page 30-36 on the user manual~

Gas samples

  • Set up the air tube for the FTIR
  • Collect background of the air in the air tube (Col Bkg)
  • Vent out air and allow the air sample to enter the tube
  • Collect sample (Col Sam)
  • Delete background data by clicking on the background spectrum and hitting the "Clear" Button
  • Save sample as a .csv file onto a flash drive; our instrument doesn't have internet

Downloading Data Files

  • Download the .csv
  • Load waves into Igor
  • Create a graph
  • Right click on the x axis numbers and hit swap to make the spectra look identical to the computer's right after the sample was collected

Example Spectra

FT-IR:Vinyl Spectrum
FT-IR:Polypropylene Spectrum
FT-IR:Polymethylmethacrylate Spectrum
FT-IR:Polyethylene terephthalate Spectrum

Links to manufacturer: http://www.gmi-inc.com/thermo-nicolet-nexus-470-ftir.html

Other links of interest

Fourier transform infrared spectroscopy (FTIR) is a technique which is used to obtain an infrared spectrum of absorption or emission of a solid, liquid or gas. An FTIR spectrometer simultaneously collects high spectral resolution data over a wide spectral range. This confers a significant advantage over a dispersive spectrometer which measures intensity over a narrow range of wavelengths at a time. Rotational–vibrational spectroscopy is a branch of molecular spectroscopy concerned with infrared and Raman spectra of molecules in the gas phase. Transitions involving changes in both vibrational and rotational states can be abbreviated as rovibrational (or ro-vibrational) transitions. https://en.wikipedia.org/wiki/Infrared_spectroscopy has some helpful gifs of how to tell if a molecule is FTIR active or not.

FTIR instrument
FTIR_cheatsheet