Aufklärung von Dissoziationsmechanismen dielektrisch behinderter Entladungen für flüchtige Element Spezies
Zusammenfassung der Projektergebnisse
A mechanistic study on the temporal behavior of the emission of tellurium, hydrogen and helium species in the plasma of a capillary DBD under analytical conditions was presented. By recording highly temporal resolved full band spectra of the plasma emission, the line intensities of these species were tracked along the discharge cycle. The comparison of two different Te transitions showed, that the maximum emission from the Te 225.9 nm transition with a lower upper energy level is delayed to the signal from the Te 238.6 nm line. At this later time during the discharge cycle, the intensity of the hydrogen background is low. This results in an enhanced signal to background ratio for the 225.9 nm line. Therefore, this line serves as a good candidate for future temporally resolved calibration measurements. The knowledge of the point in time with optimal signal to background ratio allows to record a tellurium spectrum with significantly suppressed background signal. The great advantage of this approach is, that for future calibration measurements there is no need for subtracting the hydrogen background signal, which results in shorter measurement time and reduced consumption of reagents.
Projektbezogene Publikationen (Auswahl)
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Characterization of dielectric barrier discharges for analytical chemistry, Journal of Physics D: Applied Physics 51 (31) 2018 314003
FD Klute, A Schütz, S Brandt, S Burhenn, P Vogel, J Franzke
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Novel designs of dielectric barrier discharge hydride atomizers for atomic spectrometry, Spectrochimica Acta Part B: Atomic Spectroscopy 146 2018 69-76
M Straka, S Burhenn, K Marschner, S Brandt, U Marggraf, J Dědina, ...
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Spatially and temporally resolved detection of arsenic in a capillary dielectric barrier discharge by hydride generation high-resolved optical emission spectrometry, Analytical chemistry 90 (5) 2018 3424-3429
S Burhenn, J Kratzer, M Svoboda, FD Klute, A Michels, D Veza, J Franzke
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Atomization of arsenic hydride in a planar dielectric barrier discharge: Behavior of As atoms studied by temporally and spatially resolved optical emission spectrometry, Spectrochimica Acta Part B: Atomic Spectroscopy 152 2019 68-73
S Burhenn, J Kratzer, FD Klute, J Dědina, J Franzke
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Enhancement of emission from indium in flowing liquid anode atmospheric pressure glow discharge using organic media, Talanta 204 2019 304-309
K Greda, S Burhenn, P Pohl, J Franzke
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Hydride generation atomic absorption spectrometry with a dielectric barrier discharge atomizer: Method optimization and evaluation of analytical performance for tin, Spectrochimica Acta Part B: Atomic Spectroscopy 158 2019 105630
L Juhászová, S Burhenn, L Sagapova, J Franzke, J Dědina, J Kratzer
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Influences of voltage shape and discharge gas on the temporally and spatially resolved emission characteristics of tin in a planar dielectric barrier discharge, Spectrochimica Acta Part B: Atomic Spectroscopy 161 2019 105695
S Burhenn, J Kratzer, J Dědina, J Franzke
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Review: Miniature dielectric barrier discharge (DBD) in analytical atomic spectrometry, Analytica Chimica Acta, 1147 2021 211-239
G Niu, A Knodel, S Burhenn, S Brandt, J Franzke
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Temporal evolution of tellurium emission lines in a capillary dielectric barrier discharge after hydride generation, Spectrochimica Acta Part B: Atomic Spectroscopy 171 2020 105936
S Burhenn, J Kratzer, J Franzke
