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Gas chromatographic retention times prediction for components of petroleum condensate fraction

Nagy E. Moustafa

Egyptian Petroleum Research Institute, 11727 Nasr City, Cairo, Egypt



Received: 4 October 2008  Revised: 30 January 2009  Accepted: 30 January 2009

Abstract: A new and simple quantitative structure-retention relationship (QSRR) was tested as a predictive model for adjusted retention times in complex petroleum condensate fractions. This relationship adopted the form of a non-linear collective retention-variables model. The adjusted retention times were correlated with the components molecular descriptors, e.g. total path counts and boiling temperatures, by multi-linear regression analysis. The obtained two QSRR models show an acceptable predictive accuracy with R 2 of 0.9949 and 0.9856, respectively. Stability and validity of the models were tested by comparing the calculated and the experimental retention indices.

Keywords: QSRR - gas chromatography - petroleum condensate fractions - non-linear equation

Full paper is available at

DOI: 10.2478/s11696-009-0045-3


Chemical Papers 63 (5) 608–612 (2009)

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