Determination of diffusion coefficients of selected long chain hydrocarbons using reversed- flow gas chromatographic technique

Khalid, K. and Zain, S.M. and Khan, R.A. (2011) Determination of diffusion coefficients of selected long chain hydrocarbons using reversed- flow gas chromatographic technique. E-Journal of Chemistry, 8 (4). pp. 1916-1924. ISSN 09734945

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Abstract

The reversed-flow gas chromatography (RF-GC) technique was used to study the evaporation rate and estimating the diffusion coefficient of samples. The RF-GC system comprises of six-port valve, sampling and diffusion column, detector and modified commercial gas chromatography machine. Selected long chain of hydrocarbons (99.99% purity) was used as samples. The solute (stationary phase) were carried out by carrier gas (mobile phase) to the detector. The data obtained from the RF-GC analysis were analysed by deriving the elution curve of the sample peaks using mathematical expression to find the diffusion coefficients values of respective liquids. The values obtained were compared with theoretical values to ensure the accuracy of readings. The interesting findings of the research showed the theoretical values of equilibrium at liquid-gas interphase lead to profound an agreement with the experimental evidence, which contributes for the references of future studies. © Copyright E-Journal of Chemistry 2004-2011.

Item Type: Article
Additional Information: Department of Chemistry, Faculty of Science Building, University of Malaya, 50603 Kuala Lumpur, MALAYSIA
Uncontrolled Keywords: Diffusion coefficient, Liquid pollutants, Long chain hydrocarbons, RF-GC
Subjects: Q Science > QD Chemistry
Divisions: Faculty of Science > Dept of Chemistry
Depositing User: Miss Malisa Diana
Date Deposited: 13 May 2013 01:55
Last Modified: 13 May 2013 01:55
URI: http://eprints.um.edu.my/id/eprint/6061

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