Summary
Large volume TCD cells, as commonly used in gas chromatographs, can be used as detectors in capillary gas chromatography without loss of separation efficiency and sensitivity, by expanding the column effluent. This can be achieved by inserting a throttle between the column and the detector cell and reducing the pressure in the cell. A device working at a cell pressure of 20 mbar was studied to determine its usefulness for practical analytical work. The construction of the detector is described. The results of measurements concerning the linearity, sensitivity and accuracy of the detector, when used with glass capillary columns are given.
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Proske, M.G., Bender, M., Schirrmeister, H. et al. A new way of using thermal conductivity detectors in capillary gas chromatography. Chromatographia 11, 715–719 (1978). https://doi.org/10.1007/BF02269106
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DOI: https://doi.org/10.1007/BF02269106