Plasma activated water is a chemically active aqueous medium characterized by the presence of reactive oxygen and nitrogen species created by plasma exposure. This particular chemical composition is the starting point of extensive research studies in several domains such as bio-disinfectant in biomedical applications or as fertilizer in agricultural applications. These various applications need adjustments of the PAW properties and consequently require a better control of the PAW chemical composition. To achieve this aim, a UV spectrophotometric method (190–255 nm) is implemented to simultaneously detect the nitrate and nitrite ions in plasma activated water by a gliding arc discharge reactor at atmospheric pressure. The method, tested in plasma activated distilled water (PADW) and in plasma activated tap water (PATW), shows significant increases of nitrite and nitrate concentrations. Preliminary results on PADW and PATW kinetics evolutions highlight a different behavior of the temporal post-discharge reactions leading to non-conversion of the nitrite ions in the case of PATW. The near non-existence of acidification during and after plasma activation encountered in PATW is due to high levels of carbonate species in tap water acting as a buffer solution. Indeed, the presence of hydrogen carbonate (HCO₃⁻) leads to the acidity consumption during plasma activation whereas the presence of non-dissolved limestone in hard water (CaCO₃) acts as carbonates reserve, and this induces the acidity consumption after plasma treatment.

中文翻译：

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常压滑弧等离子活化水的分析：水的化学成分对活化的影响

等离子体活化水是一种化学活性水介质，其特征在于存在由等离子体暴露产生的活性氧和氮物质。这种特殊的化学成分是在多个领域进行广泛研究的起点，例如生物医学应用中的生物消毒剂或农业应用中的肥料。这些不同的应用需要调整 PAW 的特性，因此需要更好地控制 PAW 的化学成分。为了实现这一目标，采用紫外分光光度法（190-255 nm），通过滑动电弧放电反应器在大气压下同时检测等离子体活化水中的硝酸根和亚硝酸根离子。该方法在等离子活化蒸馏水 (PADW) 和等离子活化自来水 (PATW) 中进行测试，显示亚硝酸盐和硝酸盐浓度显着增加。PADW 和 PATW 动力学演变的初步结果突出了在 PATW 的情况下导致亚硝酸根离子未转化的时间后放电反应的不同行为。在 PATW 中遇到等离子体激活期间和之后几乎不存在酸化，这是由于作为缓冲溶液的自来水中的碳酸盐物质含量高。事实上，碳酸氢盐（HCO 在 PATW 中遇到等离子体激活期间和之后几乎不存在酸化，这是由于作为缓冲溶液的自来水中的碳酸盐物质含量高。事实上，碳酸氢盐（HCO 在 PATW 中遇到等离子体激活期间和之后几乎不存在酸化，这是由于作为缓冲溶液的自来水中的碳酸盐物质含量高。事实上，碳酸氢盐（HCO₃ ^- ) 导致等离子体活化过程中的酸度消耗，而硬水中未溶解的石灰石 (CaCO ₃ ) 的存在充当碳酸盐储备，这导致等离子体处理后的酸度消耗。