FTIR spectroscopy, or Fourier Transform Infrared Spectroscopy, is an analytical technique used to identify and study the chemical composition of materials. It works by passing infrared light through a sample, which absorbs specific wavelengths corresponding to the vibrations of molecular bonds. The resulting spectrum provides a unique fingerprint of the sample, allowing scientists to determine its molecular structure. This method is widely used in various fields, including chemistry, biology, and materials science. FTIR can analyze solids, liquids, and gases, making it versatile for applications such as quality control, environmental monitoring, and forensic analysis.