Assessment of reactive species concentrations in plasma-treated water: a pH and conductivity-based method validated by absorption spectroscopy

Jovana Petković (Corresponding author), Robin van de Wege, J.R. Wubs, Olivier J.A.P. van Rooij, Jeroen J. van Oorschot, Tom Huiskamp, Ana Sobota

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Abstract

To assess the species in plasma-treated water, two methods were compared: calibrated
absorption spectroscopy and a method using pH and conductivity to determine the amount of
dominant reactive species in the water. A function fitting method was developed for the analysis
of the absorption spectra based on solutions with known concentrations. The influence of
plasma treatment time on demineralized water and the NO−x concentration was studied using the two methods; the results in both cases show an almost linear growth with time. The method,
utilizing pH and conductivity, shows consistent results with those achieved using UV absorption
spectroscopy in considerably less time and in a more cost-efficient manner.
Original languageEnglish
Article number235202
Number of pages8
JournalJournal of Physics D: Applied Physics
Volume57
Issue number23
Early online date18 Mar 2024
DOIs
Publication statusE-pub ahead of print - 18 Mar 2024

Funding

This publication is part of a TKI Project (WASPD) and an NWO Project (TTW-17183). AS would also like to acknowledge the TU/e-UU-UMCU Alliance program. The work is associated with COST Actions PlAgri CA19110 and PlasTher CA20114.

FundersFunder number
Nederlandse Organisatie voor Wetenschappelijk OnderzoekTTW-17183
TU/e-UU-UMCUCA19110, CA20114

    Keywords

    • plasma treated water
    • absorption spectroscopy
    • Kohlrausch’s law

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