, Volume 17, Issue 2, pp 75–78 | Cite as

Evaluation of the enrichment factor in gas chromatographic preconcentration of impurities

  • L. Ya. Gavrilina
  • V. I. Zheivot
  • I. D. Emelyanov


Based on gas chromatographic retention data obtained on a given adsorbent and at a given trap efficiency at different temperatures new equations are proposed for the evaluation of the enrichment factor. These equations are suitable under various preconcentration conditions such as: equilibrium saturation, complete trapping and permissible losses. Compared to known expressions for the evaluation of the enrichment factor the equations suggested consider the band broadening of the impurity in a trap causing a loss of the substance at the adsorption stage and dilution of the sample during desorption when the desorbed impurities are directed into the gas chromatographic column without intermediate freezing out in an graphic column without intermediate freezing out in an empty tube. The new equations may be used to select the optimum preconcentration conditions providing the necessary sensitivity.

Key Words

Gas chromatography Trace analysis GC-concentration Enrichment factor Theoretical evaluation 


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Copyright information

© Friedr. Vieweg & Sohn Verlagsgesellschaft mbH 1983

Authors and Affiliations

  • L. Ya. Gavrilina
    • 1
  • V. I. Zheivot
    • 1
  • I. D. Emelyanov
    • 1
  1. 1.Analytical Laboratory of the Institute of CatalysisSiberian Branch of the Academy of Sciences of the U.S.S.R.NovosibirskU.S.S.R.

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