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首页> 外文期刊>Journal of Applied Electrochemistry >Stability of mercury film electrodes under the influence of high frequency (500 kHz) ultrasound
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Stability of mercury film electrodes under the influence of high frequency (500 kHz) ultrasound

机译：高频（500 kHz）超声影响下汞膜电极的稳定性

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摘要

The analytical utility of coupling high frequency ultrasound (500 kHz) systems with electrochemical stripping techniques has been investigated. The stability of mercury film electrodes (on either glassy carbon or iridium substrates) under various ultrasound regimes was assessed with cavitational erosion found to occur irrespective of the substrate or position within the cell assembly. Removal of dissolved gas was found to increase the lifetime of the mercury film but only through sacrificing enhancements in mass transport. A second series of experiments investigated the influence of ultrasound frequency (20 and 500 kHz) on the stripping voltammetric determination of lead and cadmium at bare glassy carbon electrodes. The results were compared with silent conditions with the high frequency system shown to significantly enhance the accumulation of the target analyte.
机译：已经研究了将高频超声（500 kHz）系统与电化学剥离技术结合使用的分析实用性。使用发现的空化腐蚀来评估汞膜电极（在玻璃碳或铱衬底上）在各种超声处理下的稳定性，而空化腐蚀的发生与衬底或电池组件中的位置无关。发现除去溶解的气体可以延长汞膜的寿命，但是只能通过牺牲质量传输的增强来实现。第二系列实验研究了超声频率（20和500 kHz）对在裸露玻璃碳电极上溶出伏安法测定铅和镉的影响。将结果与静音系统进行了比较，结果表明该高频系统显着增强了目标分析物的积累。

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