Physical Sciences and Mathematics Commons^™

Interaction Between Air Plasma-Produced Aqueous 1o2 And The Spin Trap Dmpo In Electron Spin Resonance, Chen Chen, Fanying Li, Hai-Lan Chen, Michael G. Kong

Bioelectrics Publications

A series of electron spin resonance (ESR) experiments is done to quantitatively measure the concentrations of aqueous ¹O₂ and OH produced by a surface micro-discharge air plasma device. ¹O₂ is tested to be existed in the plasma treated solution by using the spin trap of TEMP. However, the unexpected DMPOX spectrum is observed in measuringOH by the spin trap of 5,5-Dimethyl-1-Pyrroline-N-Oxide (DMPO). With more chemical scavenger experiments, it is found that removal of aqueous ¹O₂ leads to the disappearance of DMPOX in ESR. Therefore, the generation of DMPOX is directly related to the oxidation …