1982 Volume 31 Issue 9 Pages 494-498
Discrimination ability was studied on an evaluation method of chromatographic profile of gel permeation chromatography with pattern similarity. A training set was composed of thirty-one chromatograms of fifteen kinds of crude oils (twelve from the Middle East and three from Indonesia). A test set was composed of sixty-five chromatograms of the crude oils of different lots and weathered oils. The weathering of the crude oil was performed by floating the oils on an open-air pool. Stationary and mobile phases of the chromatography were polystylene gel HSG-15 and tetrahydrofuran, respectively. The chromatograms were obtained by measuring absorbance at 254 nm. Section areas of each chromatogram were printed out by a data processor. Pattern similarity on a pair of chromatograms was calculated with ten section areas selected from a range of 4.567.37 count number of siphon counter. Each chromatogram of the test set was checked whether the crude oil of training set whose rank of pattern similarity became first was same with the crude oil of test set or not. Correct discrimination of the test set was 78 %. Effects of an acquisition range and the number of section areas on discrimination were studied.
