On-line liquid backflush—a new technique for GC analysis of samples containing nonvolatile material
✍ Scribed by Hagman, Gunnar ;Roeraade, Johan
- Publisher
- John Wiley and Sons
- Year
- 1993
- Tongue
- English
- Weight
- 446 KB
- Volume
- 16
- Category
- Article
- ISSN
- 0935-6304
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✦ Synopsis
Abstract
Deteriorated performance in capillary GC is often caused by the deposition of nonvolatile components in capillary GC inlets. In many cases this is a limiting factor in trace analysis of complex samples. Volatile solutes of the sample interact with the high boiling material, which leads to broadened and unsymmetrical peaks. This paper describes a novel technique which utilizes independent temperature programs of a retention gap and the column as well as a liquid backflush of the retention gap. Samples that normally contaminate the retention gap after a few injections can be repeatedly injected over extended periods of time, while the chromatographic resolution is retained.