Solute focusing technique for on-column injection in capillary gas chromatography
US4477266A · kind A · utility
25Cited by
2References
4Claims
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Key dates
| Filing date | Sep 15, 1983 |
| Grant date | Oct 16, 1984 |
| Priority date | — |
| Expiry date | Sep 15, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2030/3046
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A solute focusing method is applied to the on-column injection of a liquid sample in gas chromatography so that relatively large sample sizes can be used without causing intolerable column flooding. The injection zone of the column is kept originally at a temperature below the solvent boiling point but the temperature in the adjacent downstream zone is kept higher than the solvent boiling point so that the solvent will evaporate and flow downstream, leaving the solute molecules concentrated within a relatively limited length along the column.
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