Table of Contents
What is the difference between FTIR and UV VIS?
UV (Ultra-violet) spectrophotometers use visible light to determine the concentration of chemicals in a mixture. FTIR (Fourier-Transform Infrared Spectroscopy) uses infrared light to the same purpose. Atoms and molecules absorb the energy from the light and under-go electronic transitions.
Is NIR and FTIR same?
FTIR uses mid-infrared wavelengths of light (MIR), which are those between 20 and 2.5 µm wavelength. NIR uses near-infrared wavelengths of light (hence the NIR name) which are those of 2.5 to 0.7 µm wavelength.
What is the fundamental difference between IR detectors and UV-Vis detectors?
In general, UV/vis detectors convert a photon of light into an induced current. Conversely, IR detectors use the temperature dependence of resistance of metals to measure a change in temperature as a result of a change in current/potential. (b) Explain the operation of one type of IR detector.
What are the advantages of Fourier Transform Infrared FTIR spectrophotometer over the dispersive spectrophotometers?
Virtually all infrared spectrometer manufacturers are now using FT designs instead of dispersive. The benefits of upgrading to an FTIR from an existing dispersive infrared instrument will be immediately evident in spectral quality, data collection speed, reproducibility of data, and ease of maintenance and use.
What are the applications of FTIR?
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.
Is infrared same as UV?
Infrared and ultraviolet radiation are two types of electromagnetic radiation. The key difference between infrared and ultraviolet radiation is that the wavelength of infrared radiation is longer than that of visible light, whereas the wavelength of ultraviolet radiation is shorter than the wavelength of visible light.
Which detectors are used in infrared spectroscopy?
The detectors can be classified into three categories, thermal detectors, pyroelectric detectors and photoconducting detectors. Thermal detectors can be used over a wide range of wavelengths and they operate at room temperature.
What is FTIR (Fourier transform infrared spectroscopy)?
Fourier transform infrared spectroscopy (FTIR) uses the mathematical process (Fourier transform) to translate the raw data (interferogram) into the actual spectrum. FTIR method is used to obtain the infrared spectrum of transmission or absorption of a fuel sample. FTIR identifies the presence of organic and inorganic compounds in the sample.
What is the difference between dispersive and Fourier transform spectroscopy?
This confers a significant advantage over a dispersive spectrometer, which measures intensity over a narrow range of wavelengths at a time. The term Fourier-transform infrared spectroscopy originates from the fact that a Fourier transform (a mathematical process) is required to convert the raw data into the actual spectrum.
What is the Fourier transform used for?
A Fourier transform (FT) is a mathematical procedure that can be used to determine the individual frequency components and their amplitudes that are used to construct a composite wave. The Fourier transform allows you to convert a time domain spectrum to a frequency domain spectrum.
How does a Fourier transfer infrared spectrophotometer work?
A schematic of an interferometer used in a Fourier Transfer Infrared Spectrometer (FTIR). Infrared radiation is typically generated by passing electricity through a conducting ceramic bar (glow bar). First the radiation reaches a “beam splitter”.