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首页> 美国卫生研究院文献>Sensors (Basel Switzerland) >A Critical Review of Published Data on the Gas Temperature and the Electron Density in the Electrolyte Cathode Atmospheric Glow Discharges
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A Critical Review of Published Data on the Gas Temperature and the Electron Density in the Electrolyte Cathode Atmospheric Glow Discharges

机译：对公开发表的有关阴极阴极大气辉光放电中气体温度和电子密度的数据的评论综述

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摘要

Electrolyte Cathode Discharge (ELCAD) spectrometry, a novel sensitive multielement direct analytical method for metal traces in aqueous solutions, was introduced in 1993 as a new sensing principle. Since then several works have tried to develop an operational mechanism for this exotic atmospheric glow plasma technique, however these attempts cannot be combined into a valid model description. In this review we summarize the conceptual and technical problems we found in this upcoming research field of direct sensors. The TG gas temperature and the ne electron density values published up to now for ELCAD are very confusing. These data were evaluated by three conditions. The first is the gas composition of the ELCAD plasma, since TG was determined from the emitted intensity of the N2 and OH bands. Secondly, since the ELCAD is an atmospheric glow discharge, thus, the obtained TG has to be close to the Te electron temperature. This can be used for the mutual validation of the received temperature data. Thirdly, as a consequence of the second condition, the values of TG and ne have to agree with the Engel-Brown approximation of the Saha-equation related to weakly ionized glow discharge plasmas. Application of non-adequate experimental methods and theoretical treatment leads to unreliable descriptions which cannot be used to optimize the detector performance.
机译：电解质阴极放电（ELCAD）光谱法是一种新的灵敏的多元素直接分析水溶液中金属痕迹的新方法，作为一种新的传感原理，于1993年推出。从那时起，数项工作试图为这种奇异的大气辉光等离子技术开发一种运行机制，但是，这些尝试无法被组合为有效的模型描述。在这篇综述中，我们总结了在即将到来的直接传感器研究领域中发现的概念和技术问题。到目前为止，ELCAD的TG气体温度和ne电子密度值非常令人困惑。这些数据通过三个条件进行评估。首先是ELCAD等离子体的气体成分，因为TG是根据N2和OH谱带的发射强度确定的。其次，由于ELCAD是大气辉光放电，因此，获得的TG必须接近Te电子温度。这可用于相互验证接收到的温度数据。第三，由于第二种条件，TG和ne的值必须与与弱电离辉光放电等离子体有关的Saha方程的Engel-Brown近似一致。不适当的实验方法和理论处理方法的应用导致描述不可靠，无法用于优化检测器性能。

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