A Diffuse Reflectance Interface for SFC/FT-IR

Kenneth H. Shafer; Stephen L. Pentoney; Peter R. Griffiths

doi:10.1117/12.970769

20 December 1985 A Diffuse Reflectance Interface for SFC/FT-IR

Kenneth H. Shafer, Stephen L. Pentoney, Peter R. Griffiths

Proceedings Volume 0553, Fourier and Computerized Infrared Spectroscopy; (1985) https://doi.org/10.1117/12.970769
Event: 1985 International Conference on Fourier and Computerized Infrared Spectroscopy, 1985, Ottawa, Canada

Abstract

Supercritical fluid chromatography (SFC) permits nonvolatile or thermally labile compounds to be separated at high resolution without necessarily using a mobile phase which is liquid at atmospheric pressure or room temperature. The most common mobile phase to date has been carbon dioxide, at a pressure above about 1000 p.s.i. and a temperature above 35Â°C. Both packed columns of the type used for high performance liquid chromatography (HPLC) and wall coated open tubular (WCOT) capillary columns of the type used for high resolution gas chromatography (GC) can be used. In this paper, we report the on-line measurement of infrared spectra of peaks eluting from SFC columns using two approaches: 1) By passing the effluent from the column directly through a flow cell; 2) By eliminating the mobile phase while depositing the solute on KC1 powder prior to measuring its diffuse reflectance (DR) spectrum.

Citation Download Citation

Kenneth H. Shafer, Stephen L. Pentoney, and Peter R. Griffiths "A Diffuse Reflectance Interface for SFC/FT-IR", Proc. SPIE 0553, Fourier and Computerized Infrared Spectroscopy, (20 December 1985); https://doi.org/10.1117/12.970769

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