38.    ANDERSON, J. A., AND SEYFRIED, W. D.  Determination of Oxygenated and Olefin Compound Types by Infrared Spectroscopy.  Anal. Chem., vol. 20, No. 11, 1948, pp. 998-1006.

               Laboratory investigation of relationship between molecular structure of organic compounds and their infrared-absorption spectra has resulted in development of procedures for the quantitative to semi-quantitative determination of individual compound types in complex mixtures employing infrared-absorption spectroscopy in the liquid phase. At present, it is possible to make determinations for the functional groups of alcohols, aldehydes, carboxylic acids, esters, ketones, and 5 different olefin types in complex samples such as hydrocarbon-synthesis naphthas in about 4 hr.  For oxygenated types, average accuracy (deviation from true composition) ranges from + or –10% to + or –20%, depending upon type and complexity of mixture.  For olefin types, the average deviation is about + or – equivalent Br number units.