Determination of molecular diffusion coefficients in liquid crystal 4,4′-bis(heptyloxy)azoxybenzene by gas chromatography

1993 ◽  
Vol 35 (9-12) ◽  
pp. 539-542 ◽  
Author(s):  
I. Medina
Keyword(s):  
Gas Chromatography ◽  
Liquid Crystal ◽  
Diffusion Coefficients ◽  
Molecular Diffusion

Determination of precise and reliable gas diffusion coefficients by gas chromatography

1976 ◽  
Vol 98 (17) ◽  
pp. 5101-5107 ◽  
Author(s):  
Frank Yang ◽  
Stephen Hawkes ◽  
F. T. Lindstrom
Keyword(s):  
Gas Chromatography ◽  
Diffusion Coefficients ◽  
Gas Diffusion

The determination of molecular diffusion coefficients by the barometric method

2008 ◽  
Vol 82 (7) ◽  
pp. 1225-1228 ◽  
Author(s):  
O. A. Kashirskaya ◽  
V. A. Lotkhov ◽  
V. V. Dil’man
Keyword(s):  
Diffusion Coefficients ◽  
Molecular Diffusion

scholarly journals Determination of Diffusion Coefficients of Selected Long Chain Hydrocarbons using Reversed- Flow Gas Chromatographic Technique

2011 ◽  
Vol 8 (4) ◽  
pp. 1916-1924 ◽  
Author(s):  
Khalisanni Khalid ◽  
Rashid Atta Khan ◽  
Sharifuddin Mohd Zain
Keyword(s):  
Gas Chromatography ◽  
Diffusion Coefficients ◽  
Elution Curve ◽  
Mathematical Expression ◽  
Chromatographic Technique ◽  
Reversed Flow ◽  
Future Studies ◽  
And Diffusion ◽  
Long Chain

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.

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