Automatic Headspace and Programmed Temperature Vaporizer (PTV) Operated in Cryo-Enrichment Mode in High Resolution Gas Chromatography
- 1 March 1985
- journal article
- Published by Oxford University Press (OUP) in Journal of Chromatographic Science
- Vol. 23 (3) , 114-119
- https://doi.org/10.1093/chromsci/23.3.114
Abstract
The design and operation of a cryo-enrichment system in automatic headspace high resolution gas chromatography is described. The system consists of an automatic headspace sampler coupled to a gas chromatograph. The design of the programmed temperature vaporizer (PTV) allows the complete transfer of large amounts of the headspace gas sample to a capillary column without loss of efficiency and avoids the normal split mode of injection. The total transfer is obtained by moving the headspace gas through the PTV precolumn filled with 1 mg of adsorbent kept at cryogenic temperature. Thermal desorption takes place as a second automatic step to move the entrapped solutes to the capillary column. No modification to the commercial instrumentation is required and the entire process is automatically controlled.Keywords
This publication has 0 references indexed in Scilit: