NIR-Spectroscopy: Chemometric Analysis Of Benzine Fractions And Oils (pp. 273-282)
Authors: Safieva, R. Z.; Syunyaev, R. Z.; Purevsuren, S. (Gubkin State Oil and Gas University, Moscow, Russia) Chulyukov O. G. and Demygin, S. S. ("Lumex-Centrum"Ltd., Moscow, Russia)
Abstract: Chemometric analysis of benzine fractions and oils is made by the PLS-method using the laboratory reference values and the NIR spectral data. Benzine distillate fractions (50 samples) are distillated under the atmospheric pressure. These samples were kindly provided by the oil refinery (Orsk, Russia). Also, 25 samples of origin oils are investigated. Spectral data are obtained and processed by analyzer "INFRALUM FT-10" designed by Russian company "LUMEX" with original software. Calibration models with high prediction ability for the properties of benzine fractions (density, fractional composition: initial and final boiling point, the temperature of distillation 10%, 50%, 90%; octane number; contents of resins) as well as for properties of oil samples (density, fractional composition, initial boiling point, output to 200C, 300C, 350C; viscosity at 20C; 30C; 50C; temperature of freezing) are created. The standard error of cross validation (SECV) is calculated Cross validation shows a rather high precision of the calibration models. The predictive ability of the suggested models obtained for oils could give a basis for development of express-method that evaluate density and output of fraction up to 300?. In many cases the repeatability of spectral analysis was higher than repeatability of reference methods.