The effect of pulse UV plasma irradiation of liquid through rat skin

Abstract

The formation of active particles in water samples exposed to ultraviolet radiation from spark discharge plasma in an atmosphere of air was investigated. The surface of the water samples was either exposed or covered by rat skin. The products accumulated in water during the first 3 days were identified as nitrite ions NO₂⁻, and the final product was identified as NO₃⁻. The intermediate products that occurred on the 3rd day and disappeared on the 14th day after the treatment were identified as peroxynitrous acid and peroxynitrite. The formation of these compounds can be associated with the decay of a long-lived complex formed under the influence of pulsed ultraviolet radiation. The decrease in pH observed in all samples could be due to the isomerization of peroxynitrous acid (ONOOH → HNO₃) that diffused through the skin as a component of a long-lived complex.