How would you describe FTIR spectrum?
In order to understand FTIR results, it’s helpful to know a little bit about how FTIR works. Essentially, by applying infrared radiation (IR) to samples of materials, FTIR analysis measures a sample’s absorbance of infrared light at various wavelengths to determine the material’s molecular composition and structure.
Which IR technique can measure 2 spectra at once?
Dispersive infrared measures 2 spectra (usually sample and background) at the same time. It is a double-beam technique. FTIR is a single-beam technique.
What is FTIR spectra used for?
FTIR spectroscopy is used to quickly and definitively identify compounds such as compounded plastics, blends, fillers, paints, rubbers, coatings, resins, and adhesives. It can be applied across all phases of the product lifecycle including design, manufacture, and failure analysis.
What are the function of two mirrors in FTIR?
By using two mirrors, one fixed and one moving, the spatially dependent amplitude is reproduced at the detector due to interference. Light from the source is collimated and directed to a beam splitter. Half the light is reflected to the fixed mirror and half transmitted to the moving mirror.
What does resolution mean in FTIR?
Resolution is one of the measurement parameters involved in obtaining spectra with FTIR. The resolution can be set to values such as 16 cm-1, 8 cm-1, 4 cm-1, or 2 cm-1. It indicates the degree of fineness of the data obtained by measurement (i.e., the minimum peak interval that can be distinguished).
What is spectral resolution in remote sensing?
Spectral resolution describes the ability of a sensor to define fine wavelength intervals. The finer the spectral resolution, the narrower the wavelength range for a particular channel or band.
What are the basic components of FTIR instrumentation?
The three major parts of an FTIR are the source, interferometer, and detector (Figure 4).