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Liquid-to-gas transfer of sodium in a liquid anode glow discharge
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DOI：10.1088/1361-6463/ae5e83.png)
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Abstract
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Solute transfer from the liquid to the gas phase in plasmas has been widely used in analytical chemistry often focused on liquid cathode discharges. In this study, we report on time-resolved absolute density measurements of sodium in a glow discharge plasma with a NaCl solution anode using two-photon absorption laser induced fluorescence. The averaged maximum sodium density is found to be similar to the electron density in the discharge consistent with plasma-induced vapor generation. Random sodium flashes were also observed extending into the plasma afterglow and are attributed to sodium particles falling back on the liquid surface. Cataphoresis can explain the location of the maximum sodium density near the cathode side of the electrode gap rather than near the liquid anode region.
Keywords:
sodium transfer
glow discharge plasma
liquid anode
two-photon absorption laser induced fluorescence
cataphoresis
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