, Volume 13, Issue 2, pp 73–84 | Cite as

Generalized equations to evaluate the gas hold-up time of chromatographic systems

  • L. S. Ettre


The two approaches used for the calculation of the gas hold-up time and thus, the adjusted retention time are outlined, first for the restricted case when the carbon numbers of the three homologues used for the calculation are evenly spaced (c3−c2=c2−c1) and then, for the general case when (c3−c2) differs from (c2−c1). The basic difference in the philosophy of the two approaches is shown.

Key Words

Gas chromatography Gas hold-up time Dead time 


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Copyright information

© Friedr. Vieweg & Sohn Verlagsgesellschaft mbH 1980

Authors and Affiliations

  • L. S. Ettre
    • 1
  1. 1.The Perkin-Elmer CorporationNorwalkUSA

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