Abstract
The effect of spectrometer slit width upon the shapes of some vibrational absorption bands in solution was examined and the applicability of Ramsay's direct integration method for intensity measurement was discussed. The 1737-cm −1 band of ethyl caproate, the 1216-cm −1 band of chloroform, and the 878-cm −1 band of 1, 2, 4, 5-tetrachlorobenzene in nonpolar solvents, all shapes of which are close to Lorentzian, were observed under various conditions. It was concluded that Ramsay's direct integration method applied with adequate care is useful for intensity measurement satisfactorily within experimental error, when the band in question is Lorentzian or nearly Lorentzian.
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