Non-equilibrium radio-frequency driven atmospheric-pressure plasma in He/0.6%O₂ gas mixture has been used to study the reaction mechanism of plasma-generated oxygen atoms in aqueous solutions. The effluent from the plasma source operated with standard and ¹⁸O-labeled O₂ gas was used to treat water in the presence of phenol as a chemical probe. Comparing the mass spectrometry and gas chromatography-mass spectrometry data of the solutions treated with plasma under normal and labeled oxygen provides clear evidence that O_(aq) originating from the gas phase enters the liquid and reacts directly with phenol, without any intermediate reactions. Additionally, the atmospheric-pressure plasma source demonstrates great potential to be an effective source of O_(aq) atoms without the requirement for any precursors in the liquid phase.

中文翻译：

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水溶液中等离子体产生的氧原子的命运：非平衡大气压等离子体是原子O _（aq）的有效来源†

He / 0.6％O ₂混合气体中的非平衡射频驱动大气压等离子体已被用于研究水溶液中等离子体产生的氧原子的反应机理。来自血浆源的废水经标准和¹⁸ O标记的O ₂气体处理后，在存在苯酚的情况下用作化学探针处理水。比较在正常氧和标记氧下用等离子体处理的溶液的质谱和气相色谱-质谱数据，可以清楚地证明O _（aq）源自气相的液体进入液体并直接与苯酚反应，而没有任何中间反应。另外，大气压等离子体源显示出巨大的潜力，可以成为有效的O _（aq）原子源，而不需要液相中的任何前体。