Application of ruthenium oxide pH sensitive electrode to samples with high redox interference
Application of ruthenium oxide pH sensitive electrode to samples with high redox interference
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DOI：
10.1016/j.snb.2018.07.022
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发表时间：
2018-11-10
影响因子：
8.4
通讯作者：
Alameh, K.
中科院分区：
文献类型：
--
作者：
Lonsdale, W.;Shylendra, S. Paul;Alameh, K.
在这项工作中，溅射沉积的RuO 2 pH敏感电极的E* 值在氧化剂和还原剂的存在下发生变化，同时保持从pH 2到12的能斯特响应斜率。这一发现是用来开发一个样品平衡校准协议，允许测量样品中的pH值与强氧化还原剂，如新鲜的柑橘汁，这是以前不能测量。此外，RuO 2溅射沉积参数（等离子体气体压力，氩气/氧气比和材料厚度）的耐用的固态RuO 2 pH电极的制造进行了研究。
In this work, the E* value of a sputter deposited RuO2 pH sensitive electrode is shown to shift in the presence of oxidising and reducing agents, whilst maintaining a Nernstian response slope from pH 2 to 12. This finding is used to develop a sample-equilibration calibration protocol that allows for the measurement of pH in samples with strong redox agents, such as fresh citrus juice, which could not be measured previously. Additionally, the RuO2 sputter deposition parameters (plasma gas pressure, argon/oxygen gas ratio and material thickness) are investigated for manufacture of a durable solid-state RuO2 pH electrode.