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Effect of Spectrometer Resolution on Absorption Spectra

Volume 36, Number 1 (Feb. 1982) Page 49-52

Arora, A.K.; Kesavamoorthy, R.


The effect of spectrometer resolution on the parameters of an absorption spectrum is studied by numerical convolution. The dependencies of observed full width at half maximum (FWHM) and peak absorption on spectrometer resolution, true FWHM and peak absorption of the absorption band is obtained. The observed dependencies are explained qualitatively. Over the useful range of parameters, coupled empirical relations are obtained which estimate the parameters of the true spectrum from the parameters of the observed spectrum within 1.5%. The usefulness of the coupled empirical relations is demonstrated by applying them to C—H stretching mode of CHCl3.