Ordinate Scale Expansion for the Precise Wavenumber Measurement of Broad Infrared Absorption Bands

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The current capability of high resolution, high wave-number accuracy infrared instruments offers the potential for conveniently studying very subtle (one or two cm−1) band displacements as a function of structure or solvent (1). For measurements of tenths of cm−1 accuracy, it has formerly been necessary to calibrate the instrument carefully, using the known locations of the rotational bands of various light gases (2) and also to know the repeat-ability of the instrument to allow for errors in temperature variation, mechanical linkages, etc. The built-in accuracy of some of the newer instruments makes this procedure unnecessary.

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/000370264789620691

Affiliations: Beckman Instruments, Inc. Fullerton, California

Publication date: March 1, 1964

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