Summary
The current status of gas chromatographic procedures and instrumentation for the analysis of volatile environmental contaminants is discussed. Design features of gas chromatographic systems, capable of transferring portions of eluting compounds from one gas chromatographic column into another are also discussed. A prototype two-dimensional gas chromatograph has been built and tested. The system is composed of two separate gas chroamtographs, which are joined by a common heated interface. A combination of off-line valves and restrictors (Deans' switches) serves to change carrier gas flow directions. Compounds selected for cutting are transferred to the second gas chromatograph and held in an intermediate trap. The effluents from the second column are detected by FID/ECD, operated in parallel. Important parameters which effect sample transfer between the systems have been studied to serve as basis for a semiautomated instrument to be built. Some applications with synthetic mixtures are demonstrated.
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Bertsch, W., Anderson, E. & Holzer, G. Two-dimensional high resolution GLC environmental analysis, preliminary results. Chromatographia 10, 449–454 (1977). https://doi.org/10.1007/BF02257359
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DOI: https://doi.org/10.1007/BF02257359