Rotating disk ion selective electrodes
Rotating disk ion selective electrodes
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DOI：
10.1002/elan.1140081013
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发表时间：
1996-10-01
期刊：
影响因子：
3
通讯作者：
Cullen, P
中科院分区：
文献类型：
--
作者：
Cassidy, J;Mullen, D;Cullen, P
进行了模拟，以预测瞬态电位响应后的浓度步骤在旋转盘电极组成的一个选择性层。该模拟的基础是，由于扩散层大于电极处的双层，因此电位响应将与旋转速率无关。在实践中，发现潜在响应确实随旋转速率而变化。响应使得溶液中分析物的表观浓度随着旋转速率的增加而降低。这种行为的原因是由于对流破坏了电极表面的双层。
A simulation was undertaken to predict the transient potential response following a concentration step at a rotating disk electrode comprised of an inn selective layer. A basis for this simulation was that the potential response would be independent of rotation rate since the diffusion layer is larger than the double layer at the electrode. in practice it was found that the potential response does vary with rotation rate. The response was such that the apparent concentration of the analyte in solution decreased with increased rotation rate. The reason for this behavior is due to the disruption of the double layer at the electrode surface by convection.