Fourier Transform Infrared Spectrometer (FTIR)

Fourier-Transform Infrared Spectroscopy is a powerful analytic technique which is used to obtain Infrared spectrum of absorption or transmission of a solid, liquid or a gas.

The technique can provide information about organic, polymeric, and, in some cases, inorganic materials. When infrared radiation falls on a compound, molecular vibration generates unique absorption patterns and hence different chemical compounds and their composition can be identified. Due to its accuracy, versatility and accuracy, this technique have applications in a variety of fields including Chemical Science, Material Science, Pharmaceuticals, Environmental Science and forensic Science etc.

Working Principle

The key component of an FTIR spectrometer is the interferometer. It’s used to modulate the infrared radiation, splitting it into two beams. One beam passes through the sample, while the other doesn’t. The beams are then recombined, and the resulting interference pattern is analyzed. The interference pattern contains information about the absorption of infrared radiation by the sample at different frequencies. A mathematical technique called Fourier transform is used to convert this pattern into a spectrum, which represents the intensity of absorption as a function of frequency.

Specifications of the instrument

• Company –Thermo Scientific
• Model –Nicolet Summit X
• Mode – Transmission & ATR
• Wavenumber range – 4000-400cm-1
• Maximum Resolution –0.45cm -1
• Sample Types – Liquids