Multidimensional gas chromatographic separation of halocarbons from permanent gases using a capillary as the precolumn for a packed column
✍ Scribed by Steven M. Fields
- Publisher
- John Wiley and Sons
- Year
- 1996
- Tongue
- English
- Weight
- 856 KB
- Volume
- 8
- Category
- Article
- ISSN
- 1040-7685
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✦ Synopsis
The chromatographic problems associated with strong adsorption of halocarbons onto a Chromosorb 107 packed column were eliminated by using multidimensional gas chromotography. The adsorption required rapid temperature programming to elute the halocarbons in a reasonable time, in turn producing peaks that interfered with the analysis of other sample components. In the multidimensional systems, the halocarbons are retained on a 530 p m i d . capillary column while gaseous sample components pass through to a Chromosorb 107 packed column. In series/bypass mode, the packed column is isolated from the flow stream to allow the halocarbons to elute from the capillary column and then returned to elute the gases. In sequence reversal mode, the column flow sequence is reversed and the halocarbons elute directly to the detector, followed by the gas components. Both techniques eliminated the problems associated with adsorption of halocarbons onto the packed column. Overall performance and instrument ruggedness was superior in the sequence reversal mode. A packed column backflush technique was also evaluated, but the detection limit for the halocarbons was too high. o 1996 John Wiley & Sons, Inc.