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Non-thermal plasma in contact with water: The origin of species (external resource)

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Resource range The results of the plasma exposure of the samples (e.g., the absolute values of concentration of DMPO-OH) were largely affected by small changes in the configuration of the jet, such as the electrodes contact with the quartz tube, the depth of the tube protrusion inside the reactor, and the vertical alignment of the tube. However, while the numerical values changed, the observed trends remained persistent. For example, the concentration of DMPO-OH increased with the initial introduction of H₂O to He feed gas and decreased with higher H₂O content, the concentration of DMPO-OH was lower at 4 mm distance than 10 mm, etc. Thus, the error assessment was performed within a set configuration of the jet for several conditions. Conditions of less uniform plasma nature (i.e., in the presence of large amounts of admixtures in the feed gas) generally lead to an increase in standard deviation of the concentration values. The maximum deviation from the mean was found to be ca. 12%.
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