Applications Of Fourier Transform NIR/Raman

ABSTRACT A NIR Raman accessory has been designed for use with a Perkin- Elmer Model 1700 Fourier Transform Spectrometer. The design does not interfere with application of the instrument for normal mid- infrared spectroscopy. In order to demonstrate performance, a number of different types of samples and analytical problems have been considered. These include structure-spectra correlations, pharmaceuticals, polymers, highly colored and fluorescent materials, and sampling. 1. INTRODUCTION At the Fifth International Conference, Hirschfeld and Chase informally discussed the possibility of using near infrared excitation of the Raman effect in conjunction with a high throughput Fourier transform spectrometer. Since then several systems have been built and applied to a wide variety of samples. The primary reason for using NIR excitation has been realized, that is, substantial reduction in fluorescence as a major interference. As a result, Raman spectra may be obtained easily on a majority of samples.