Fourier Transform Infrared Analysis

Unlock the secrets of materials with precise Fourier Transform Infrared Analysis. Explore the power of spectroscopy in our in-depth guide


Fourier Transform Infrared (FTIR) analysis is a powerful technique used in the field of spectroscopy to study the interaction of infrared radiation with matter. It is particularly useful for identifying and analyzing the chemical composition of substances. Here's an overview of how FTIR analysis works:

ftir spectroscopy Material testing at KIYO RND LAB Chennai
  • Principle:

    - FTIR is based on the principle that molecules absorb specific frequencies of infrared light, resulting in characteristic vibrational transitions. - A sample is exposed to a broad spectrum of infrared light, and the transmitted or reflected light is analyzed.

  • Instrumentation:

    - The key component is the interferometer, which splits the incoming infrared beam into two paths. - One beam travels through the sample, while the other travels through a reference. - The two beams are recombined, and the resulting interference pattern is analyzed using a Fourier transform to obtain the infrared spectrum.

  • Spectrum Interpretation:

    - The resulting spectrum represents the absorption of infrared radiation at different frequencies. - Peaks in the spectrum correspond to specific vibrational modes of functional groups within the sample. - By comparing the obtained spectrum to reference spectra or databases, the chemical composition of the sample can be identified.

  • Applications:

    - FTIR is widely used in various scientific and industrial applications, including chemistry, biology, pharmaceuticals, food analysis, and material science. - It is valuable for identifying organic and inorganic compounds, determining molecular structures, and monitoring chemical reactions.

  • Sample Preparation:

    - Samples are typically prepared as thin films, pellets, or liquids to facilitate the transmission of infrared light. - Solid samples may be ground with a suitable matrix, and liquid samples can be placed in special cells.

  • Advantages:

    - FTIR provides high-resolution spectra with improved signal-to-noise ratios. - It allows for rapid data collection and is non-destructive, making it suitable for a wide range of samples.

  • Limitations:

    - Water vapor and other atmospheric gases can interfere with measurements, requiring careful sample handling. - Some materials may require special sample preparation or analysis techniques.

ftir interpretation


Fourier Transform Infrared analysis is a versatile and widely used tool for studying the molecular composition of materials, aiding researchers and analysts in various scientific and industrial fields. call us for info