Sage Journals: Discover world-class research

Abstract

The exploitation of both the multiplex and the aperture advantage in Fourier transform IR and far-IR spectroscopy may lead to nonlinear detector response or saturation of the A/D converter. This limitation of the dynamic range only concerns the center-burst peak of the interferogram function. After the Fourier transformation, the respective distortion in the frequency or—better—wavenumber domain is completely delocalized. Erroneous intensity contributions are, in principle, present in all parts of the spectrum under consideration. Thus, it is not easy to diagnose the effect of a limited dynamic range. Practical procedures for the recognition and elimination of the respective artifacts in the spectrum are, therefore, suggested; they are to be used in conjunction with the application of the IR transmission technique to surface studies of high-surface-area SiO₂.

Keywords

Infrared Instrumentation FT-IR spectroscopy Interferometry IR and far-IR regions Cryogenic detectors Dynamic range problems

Get full access to this article

View all access options for this article.

References

Griffiths

P. R.

and de Haseth

J. A.

, Fourier Transform Infrared Spectrometry (John Wiley and Sons, New York, 1986).

Bell

R. J.

, Introductory Fourier Transform Spectroscopy (Academic Press, New York, 1972).

Horlick

, Anal. Chem. 43, 61 (1971).

Geick

, Fortschr. Chem. Forsch. 58, 73 (1975).

Knözinger

, Angew. Chem. Int. Ed. Engl. 15, 25 (1976).

Chase

D. B.

, Appl. Spectrosc. 38, 491 (1984).

Hoffmann

, Ph.D. Thesis, Universität Siegen, Siegen (1986).

Hoffmann

and Knözinger

, SPIE—Int. Soc. Opt. Eng. 553, 484 (1986).

Chase

D. B.

, Appl. Spectrosc. 36, 240 (1982).

10.

Hoffmann

and Knözinger

, Surf. Sci., paper in press.

11.

Boccuzzi

Coluccia

Ghiotti

Morterra

, and Zecchina

, J. Phys. Chem. 82, 1298 (1978).

Dynamic Range Problems in Fourier Transform IR and Far-IR Spectroscopy

Abstract

Keywords

Get full access to this article

References