What is the difference between ATR and FTIR?

FTIR is any Fourier Transform Infrared spectroscopy method in any measuring geometry, may it be transmission, reflection or whatever. ATR stands for attenuated total reflection and is developed in order to enhance the surface sensitivity since IR spectroscopy is a bulk method.

What is ATR in infrared spectroscopy?

Attenuated total reflection infrared (ATR-IR) spectroscopy is used for analysis of the surface of materials. It is also suitable for characterization of materials which are either too thick or too strong absorbing to be analyzed by transmission spectroscopy.

Where does a carbon stretch appear in an IR spectrum?

Carbonyl stretching peaks generally fall between 1900 and 1600 cm-1 (assume all peak positions hereafter are in wavenumber units), a relatively unique part of the IR spectrum. This area is sometimes referred to as the carbonyl stretching region as a result.

How is Fourier transform infrared spectroscopy ( FTIR ) used?

Fourier-transform infrared spectroscopy (FTIR) is a technique 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.

Can a Fourier transform be used to characterize graphite fiber?

Although Fourier transform infrared (FTIR) spec- troscopy has been applied successfully to study the glass fiber matrix interface [23-25] and to character- ize Kevlar fiber surfaces [26,27], FTIR analysis of carbon/graphite fiber has been difficult due to the severe scattering phenomena and the high absorp- tivity of the material.

What kind of equipment is used for Fourier transform?

Fourier transform infrared (FT-IR) spectra of the bulk and polymer-immobilized salts were recorded. For this analysis, Bruker IFS 66 FT-IR equipment, pellets in BrK, and a measuring range of 400-1500 cm −1 were used. X-ray diffraction (XRD) patterns of the solid samples were recorded.

What are the limitations of Fourier transform spectroscopy?

One limitation of this approach is that the variation of refractive index over the wavelength range limits the accuracy of the wavelength calibration. The interferogram has to be measured from zero path difference to a maximum length that depends on the resolution required.