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Vorträge und Posterpräsentationen (ohne Tagungsband-Eintrag):

M. Antoniadou, G. Zachariadis, E. Rosenberg:
"Characterising the Response Behavior of the Dielectric Barrier-Discharge Ionisation Detector for Gas Chromatography (GC-BID)";
Vortrag: 31st International Symposium on Chromatography (ISC 2016), Cork, Ireland; 28.08.2016 - 01.09.2016.



Kurzfassung englisch:
The dielectric-barrier-discharge plasma has already been used for long for spectroscopy [1], but only relatively recently as a gas chromatographic detector. In the commercial instrument, the dielectric barrier discharge serves as an ionization source that produces a concentration-proportional electron current, similarly to the GC-FID. The acronym GC-BID (GC with dielectric barrier discharge-ionization detection) coined for this system [2] emphasizes the analogy to the flame ionization detector (FID).
In this study, the performance of the BID as a GC detector was characterized and compared to GC-FID. Interesting characteristics and differences compared to the GC-FID system were found: While it is claimed that the BID´s sensitivity is equal to or exceeds that of the FID, it was demonstrated that this not necessarily is the case, but depends largely on the operation conditions (e.g. detector gas flow rate and purity), and to an even higher extent on the analyte.
This is because in contrast to the FID, where practically complete atomization and oxidation of the analyte is achieved, the BID is a low-thermal energy excitation and ionization source that does not lead to a complete destruction of the analyte molecules. Instead, singly charged molecular ions are formed, leading to a concentration- rather than a mass-dependent response. As a consequence, the advantage of superior sensitivity compared with the FID is quickly lost when the analyte´s molecular weight increases. This and other important characteristics of the BID as GC detector will be presented and discussed in detail, providing for the first time a comprehensive characterization and an objective comparison of this detector with the FID.

References:
[1] Y.-L. Yu, Y.-T. Zhuang, J.-H. Wang, Anal. Methods, 2015, 7, 1660-1666.
[2] K. Shinada, S. Horiike, S. Uchiyama, R. Takechi, T. Nishimoto, Shimadzu Review SR13_001E (2013) 5pp.

Erstellt aus der Publikationsdatenbank der Technischen Universität Wien.