FTIR spectroscopy explained

Fourier-Transform Infrared (FTIR) spectroscopy identifies chemical bonds by how a sample absorbs infrared light. The resulting spectrum is a molecular fingerprint used for material identification and quality control.

Sampling modes

• ATR (attenuated total reflectance): fast, minimal prep — the everyday workhorse for solids and liquids.
• Transmission: KBr pellets or thin films for quantitative work.

FTIR confirms incoming-material identity, detects contaminants, and verifies polymer or API form. It complements, rather than replaces, mass spectrometry.