Quantitative detection of plasma-generated radicals in liquids by electron paramagnetic resonance spectroscopy

被引：193

作者：

Tresp, H. ^{[1
,2
]}

Hammer, M. U. ^{[1
,2
]}

Winter, J. ^{[1
,2
]}

Weltmann, K-D ^{[2
]}

Reuter, S. ^{[1
,2
]}

机构：

[1] Ctr Innovat Competence Plasmatis, D-17489 Greifswald, Germany

[2] Leibniz Inst Plasma Sci & Technol INP Greifswald, D-17489 Greifswald, Germany

来源：

JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2013年 / 46卷 / 43期

关键词：

INACTIVATION; PENETRATION; TOOLS; WATER;

D O I：

10.1088/0022-3727/46/43/435401

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In this paper the qualitative and quantitative detection of oxygen radicals in liquids after plasma treatment with an atmospheric pressure argon plasma jet by electron paramagnetic resonance spectroscopy is investigated. Absolute values for center dot OH and O(2)radical anion radical concentration and their net production rate in plasma-treated liquids are determined without the use of additional scavenging chemicals such as superoxide dismutase (SOD) or mannitol (D-MAN). The main oxygen-centred radical generation in PBS was found to originate from the superoxide radical. It is shown that hidden parameters such as the manufacturer of chemical components could have a big influence on the comparability and reproducibility of the results. Finally, the effect of a shielding gas device for the investigated plasma jet with a shielding gas composition of varying oxygen-to-nitrogen ratio on radical generation after plasma treatment of phosphate-buffered saline solution was investigated.

引用

页数：8

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