Membrane Focusing-A New Injection Method for Capillary Gas Chromatography

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The principles of a new sample focusing technique in capillary gas chromatography are described. A solid-sorbent trapped sample is thermally released from the sample tube, transfered to a membrane chamber by a carrier gas and there retained by a gas separation membrane which is highly permeable to the carrier gas. After focusing in the membrane chamber the sample is injected on the column. This technique allows focusing and injection of highly volatile compounds in capillary GC without any coolant.

Original languageEnglish
Pages (from-to)1375-1387
Number of pages13
JournalAnalytical Letters
Issue number5
Publication statusPublished - Apr 1989
Externally publishedYes


  • capillary gas chromatography
  • gas separation membranes
  • sample preconcentration
  • volatile organic compounds


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