Attenuated Total Reflectance Fourier Transform Infrared Spectroscopy (ATR-FTIR)
Attenuated-total-reflectance (ATR) is a sampling mode which enhances the Fourier Transformed Infrared Spectroscopy (FTIR) signal obtained from sample surfaces, increasing sensitivity and allowing efficient measurements with minimal sample preparation. Like standard FTIR measurements, ATR-FTIR is used for chemical qualification of a sample from raw optical spectra and is often used to determine organic composition.
- Provides fingerprint identification of functional groups and compounds
- Extensive reference libraries and standardized quality testing procedures are available to aid data interpretation
- Capable of analyzing solid, liquid or powder samples
- Most inorganic materials do not exhibit FTIR spectrum
(carbonates, nitrates, silicates, sulfates DO exhibit FTIR spectra)
- Samples must not be too transmissive (some glasses) or too reflective (some metals)