Development of Miniature Solid Contact Ion Selective Electrodes for in situ Instrumentation,Electroanalysis

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Development of Miniature Solid Contact Ion Selective Electrodes for in situ Instrumentation
Electroanalysis ( IF 2.7 ) Pub Date : 2020-05-06 , DOI: 10.1002/elan.201900761
E. A. Jaramillo ₁ , A. C. Noell ₁

Affiliation

Using a standardized miniature format ion selective electrode, five different carbon based solid contact materials, including a novel commercially available graphene oxide assisted carbon nanotube dispersion (Flexiphene^TM), were compared. The electromotive force (EMF) response, stability, and behavior following storage was evaluated. Bulk resistance for the novel graphene oxide/carbon nanotube (GO‐CNT) based ISE was observed to be 0.09±0.03 MΩ, which is two orders of magnitude lower than reported for either component in isolation. The results for previously described solid contact materials are in general agreement with the literature, and the tradeoffs between solid contact layer material choices are discussed. Performance of GO‐CNT solid contact ion selective electrodes were then evaluated in a 3D‐printed fluidic array to determine their suitability for future in situ instruments.

中文翻译：

用于现场仪器的微型固体接触离子选择电极的开发

使用标准化的微型格式离子选择电极，可以使用五种不同的碳基固体接触材料，包括新型的可商购获得的氧化石墨烯辅助的碳纳米管分散液（Flexiphene ^TM）进行比较。评估了电动势（EMF）响应，稳定性和储存后的行为。新型基于氧化石墨烯/碳纳米管（GO-CNT）的ISE的体电阻为0.09±0.03MΩ，比隔离的任何一种组件的报告值低两个数量级。先前描述的固体接触材料的结果与文献基本一致，并且讨论了固体接触层材料选择之间的折衷。然后在3D打印的流体阵列中评估GO‐CNT固体接触离子选择电极的性能，以确定它们是否适合将来的原位仪器。

更新日期：2020-05-06

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