Eur. Phys. J. Appl. Phys. (2015) 71: 20809
https://doi.org/10.1051/epjap/2015150071

DC diaphragm discharge in water solutions of selected organic acids^*

¹ Faculty of Chemistry, Brno University of Technology, Purkynova 118, 612 00 Brno, Czech Republic
² ZIK Plasmatis, INP Greifswald e.V., Felix-Hausdorff-Str. 2, 17489, Greifswald, Germany

^a e-mail: xcvyhnankovae@fch.vutbr.cz

Received: 4 February 2015
Accepted: 5 March 2015
Published online: 15 July 2015

Abstract

Effect of four simple organic acids water solution on a DC diaphragm discharge was studied. Efficiency of the discharge was quantified by the hydrogen peroxide production determined by UV-VIS spectrometry of a H₂O₂ complex formed with specific titanium reagent. Automatic titration was used to study the pH behaviour after the plasma treatment. Optical emission spectroscopy overview spectra were recorded and detailed spectra of OH band and Hβ line were used to calculate the rotational temperature and comparison of the line profile (reflecting electron concentration) in the acid solutions.