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Transient infrared transmission spectroscopy.

R W Jones1, J F McClelland

  • 1Center for Advanced Technology Development, Iowa State University, Ames 50011.

Analytical Chemistry
|October 15, 1990
PubMed
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A new transient infrared transmission spectroscopy method analyzes moving solids without sample prep. This technique enables accurate quantitative compositional analysis of materials like polymers.

Area of Science:

  • Analytical Chemistry
  • Materials Science
  • Spectroscopy

Background:

  • Traditional spectroscopy methods often require extensive sample preparation.
  • Analyzing moving or optically thick solids presents unique challenges for spectral acquisition.
  • Quantitative compositional analysis demands high-quality, reproducible spectral data.

Purpose of the Study:

  • To introduce a novel transient infrared transmission spectroscopy (TITS) technique.
  • To demonstrate the capability of TITS for analyzing moving, optically thick solid samples.
  • To validate the accuracy of TITS for quantitative compositional analysis.

Main Methods:

  • Development of a transient infrared transmission spectroscopy (TITS) method.
  • Creation of a thin, short-lived, chilled layer on the sample surface.

Related Experiment Videos

  • Measurement of transmission spectra by analyzing thermal emission absorbed through the chilled layer.

    • Main Results:

    • Successfully acquired analytically useful transmission spectra from moving, optically thick solids.
    • Demonstrated high-quality spectra suitable for quantitative compositional analysis.
    • Achieved a standard error of prediction of only 0.87 mol % for methacrylate copolymer composition.

    Conclusions:

    • Transient infrared transmission spectroscopy (TITS) is a viable method for analyzing solid samples without preparation.
    • The technique provides accurate quantitative compositional analysis, even for challenging sample types.
    • TITS offers a significant advancement in spectroscopic analysis for materials science and chemistry.