Abstract
Resolution enhancement by the use of Fourier self-deconvolution has been achieved with Raman spectra obtained from an instrument with an intensified diode array detector. A minimum signal-to-noise ratio of about 500:1 is acceptable and this is readily attainable, by spectral accumulation, in the case of relatively strong peaks such as those of carbon tetrachloride at 549 cm<sup>−1</sup> and tetrahydrofuran at 915 cm<sup>−1</sup>. Resolution enhancement factors, <i>K</i>, of about 2.7 are then achieved. Weaker peaks, typified by the <i>v</i> (C-Cl) modes of poly(vinyl chloride) require more extensive spectral accumulation, but a <i>K</i> value of 2.2 has proved feasible. The finite resolution imposed by the diode array detector is not a significant limitation. In order to obtain consistently good results it is necessary to optimize the signal-to-noise ratio, by choosing instrumental operating conditions best suited to specific samples.
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