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.

中文翻译：

---

氧化钌pH敏感电极在高氧化还原干扰样品中的应用

在这项工作中，溅射沉积的RuO ₂ pH敏感电极的E *值在存在氧化剂和还原剂的情况下发生了变化，同时保持了从2到12的Nernstian响应斜率。该发现用于开发样品-平衡校准方案，该方案允许使用强氧化还原剂（例如新鲜的柑橘汁）测量样品中的pH值，而以前无法进行测量。另外，研究了RuO ₂溅射沉积参数（等离子气压，氩气/氧气比和材料厚度），以制造耐用的固态RuO ₂ pH电极。