Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Reversed-Flow Chromatographic Determination of Binary Diffusion Coefficients

Published

Author(s)

William S. McGivern, Jeffrey A. Manion

Abstract

A reversed-flow chromatographic apparatus for the measurement of binary diffusion coefficients is described. Hydrocarbons are detected using flame ionization detection, and inert species can be detected by thermal conductivity. We have measured the binary diffusion coefficients for several systems at temperatures from (300­723) K. Characterization of the new apparatus was accomplished by comparing measured binary diffusion coefficients of dilute argon in helium to literature values. Further diffusion coefficients for dilute helium in argon as well as nitrogen in helium were measured using a thermal conductivity detector. Dilute methane in helium diffusion coefficients were measured using flame ionization detection and found to be in excellent agreement with literature values. Simulations of the diffusion show specific dependences on diffusion time and injection volume that must be considered to ensure the measurement of accurate diffusion coefficients.
Citation
Journal of Chromatography A

Keywords

diffusion, chromatography, combustion, hydrocarbons

Citation

McGivern, W. and Manion, J. (2011), Reversed-Flow Chromatographic Determination of Binary Diffusion Coefficients, Journal of Chromatography A (Accessed May 18, 2024)

Issues

If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.

Created September 19, 2011, Updated February 19, 2017