Measurements of the Oxidation Properties of Nonthermal Argon Microwave Plasma Using a Ferrosulphate Dosimeter

The oxidative effects of nonthermal atmospheric–pressure argon plasma, which is an ionized gas produced under the action of microwave, are considered. The applicability of a ferrous sulfate dosimeter (Fricke dose meter) for measuring the oxidation properties of nonthermal plasma has been studied. It is shown that, under the influence of nonthermal plasma in a sample of a ferrous sulfate dosimeter, oxidants are formed, determined by the transition of iron from the divalent to trivalent state (the absorption peak at a wavelength of 304 nm). This allows us to conclude that a ferrous sulfate dosimeter can be used to quantify the oxidative potential of nonthermal plasma.