Knowledge Bank

“This paper will take the form of an “up-to-the-minute” progress report describing our experiences with the Cary Model 81 Raman spectrometer. Instrument characteristics, including determination of spectral slit widths and slit function, stability, frequency calibration, and recommended scanning conditions will be given. Specific attention will be given to the factors which determine the interlaboratory exchange of Raman spectral data---particularly for the American Petroleum Institute spectral files. Typical spectra of a variety of materials will be shown. Other associated problems which will be discussed briefly will include fluorescence, source design and lifetimes, polarization accessories, and the stability of filter solutions.”