Detection of dissolved metals using a liquid electrode dielectric barrier discharge

Analysis of dissolved metals in liquid samples using a dielectric barrier discharge with flowing liquid electrode has been studied. Inside a fused-silica capillary the discharge is ignited between the liquid surface and a tungsten electrode, driven by a pulsed high voltage. In this manner the flowing liquid acts as second electrode itself and the wall of the capillary as dielectric barrier. Due to a pulsation of the electrode gap the discharge is sustainable for one hour and more. Calibration measurements are performed for several alkali, alkaline earth metals and silver. With a flow rate of 20 µL min-1 detection limits between 0.02 mg L-1 for potassium and 6.9 mg L-1 for barium are determined. Application as metal detection system for environmental liquid samples as well as monitoring device in flow systems seems possible.

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Weiterlesen Detection of dissolved metals using a liquid electrode dielectric barrier discharge

Dissertation: Emissionsspektroskopische Diagnostik an Mikroplasmen

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Die Untersuchung von Mikroplasmen mit emissionsspektroskopischer Methoden war Thema meiner Dissertation. Hier wurden zwei Typen an Mikroplasmen untersucht, die auch in der analytischen Chemie eingesetzt werden können. Einmal handelt es…

Weiterlesen Dissertation: Emissionsspektroskopische Diagnostik an Mikroplasmen