Infrared Microspectroscopy

The infrared microspectrometer (micro-FTIR) uses an infrared source to probe absorptions in the mid-IR region of the electromagnetic spectrum. Using apertures, the radiation is allowed to pass through a very specific region of a sample (as small as 5×5 μm). The infra-red radiation interacts with the sample permitting characterization of the bonds present and in many cases, the identity of the substance or mixture being probed.  This technique is mainly used for the analysis of organic substances such as polymers, drugs, chemicals, and unknown materials; however, micro-FTIR can also be used to study inorganic materials such as minerals, fillers and extenders.  Raman microspectroscopy is a complementary technique, which permits characterization of many substances that do not absorb strongly in the IR.

Microtrace scientists have trained extensively in FTIR spectral interpretation, we maintain an extensive library of texts on FTIR spectra of specific classes of materials, and bring in subject matter experts for lectures and internal short courses to ensure Microtrace is up to date in the most recent advances in instrumentation and interpretation.  This experience is supplemented by spectral libraries of over 200,000 compounds, some of which have been developed and verified by our laboratory.

Microtrace utilizes two micro infrared spectrometers, a Perkin Elmer Spectrum Spotlight and a Thermo iN10 infrared microscope.  Utilizing a multipixel MCT detector, hyperspectral maps and  stage mapping mapping can be conducted to produce spectral images of complex matrices.  Compression cell, diamond anvil, and IR polarization optics are available for use as needed.  A standard FTIR bench is also available for macro samples and other samples requiring a custom configuration.


Related standardized methods: ASTM E2224, E2937

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