Development of a thermal desorption modulator for gas chromatography
| Autor: | Henk-Jan de Geus, Jacob de Boer, Udo A. Th. Brinkman |
|---|---|
| Přispěvatelé: | BioAnalytical Chemistry |
| Jazyk: | angličtina |
| Rok vydání: | 1997 |
| Předmět: |
Capillary electrochromatography
Chromatography Multidimensional gas chromatography Capillary action Chemistry Instrumentation Thermal desorption modulators Organic Chemistry Analytical chemistry Thermal desorption General Medicine Biochemistry Analytical Chemistry Electron capture detector Large volume injections Polychlorinated biphenyls Rijksinstituut voor Visserijonderzoek Thermal mass Gas chromatography SDG 7 - Affordable and Clean Energy Current (fluid) Netherlands Institute for Fisheries Research Chlorobiphenyls |
| Zdroj: | Journal of Chromatography. A, Including electrophoresis and other separation methods, 767(1-2), 137-151 Journal of Chromatography. A, Including electrophoresis and other separation methods 767 (1997) 1-2 de Geus, H J, de Boer, J & Brinkman, U A T 1997, ' Development of a thermal desorption modulator for gas chromatography. ', Journal of Chromatography A, vol. A767, pp. 137 . https://doi.org/10.1016/S0021-9673(97)00038-1 Journal of Chromatography A, A767. Elsevier |
| ISSN: | 0021-9673 |
| DOI: | 10.1016/S0021-9673(97)00038-1 |
| Popis: | The separation space in gas chromatography can be enhanced dramatically by the comprehensive coupling of two independent separation dimensions. An interface between the two columns must accumulate analytes eluting from the first dimension, focus them and at the appropriate moment transfer them to the heed of the second column. A thermal desorption modulator can be used for this purpose. It consists of a capillary in a relatively cold zone which effects trapping and focusing of the analytes. A current through a conductive material on the outside of the capillary provides rapid heating and consequently a fast transfer of the analytes to the second column. Several conductive materials were applied using different techniques and their performance was evaluated. The durability of thin metal coatings was found insufficient. The use of a wire coiled around the capillary was more robust and its temperature response appeared to be fast enough, despite the higher thermal mass. The effect of voltage and heating time on the thermal desorption was studied and various temperature estimations were made. Large-volume on-column re-injection and semi-comprehensive multidimensional gas chromatography of chlorobiphenyls are shown as examples. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect