Electron Science Research Institute, Edith Cowan University, Joondalup, WA 6027, Australia.
Electron Science Research Institute, Edith Cowan University, Joondalup, WA 6027, Australia.
Talanta. 2019 May 1;196:18-21. doi: 10.1016/j.talanta.2018.12.037. Epub 2018 Dec 12.
In this work, an all solid-state potentiometric pH sensor is developed, which employs a thin-film sputter deposited RuO working electrode, a polyvinylbutyral-SiO modified RuO reference electrode and 3D printed electrode housing. The developed sensor exhibits linear pH response (- 55.7 mV/pH, R = 0.9997) and reasonable reproducibility (hysteresis < 2 mV). Experimental results show that by using a previously developed sample-equilibration and single-point calibration protocol, an accuracy of ± 0.2 pH is achieved in a variety of sample matrices. However, by employing a matrix matched standard, bias errors are reduced and accuracy is improved to ± 0.1 pH, when compared to a commercial glass pH sensor. The developed sensor and measurement protocol is then rationalised for low throughput analysis by unskilled users.
本工作开发了一种全固态电位型 pH 传感器，它采用溅射沉积的薄膜 RuO2 工作电极、聚丁二烯-SiO2 修饰的 RuO2 参比电极和 3D 打印的电极外壳。所开发的传感器具有线性 pH 响应（-55.7 mV/pH，R = 0.9997）和良好的重现性（滞后<2 mV）。实验结果表明，通过使用先前开发的样品平衡和单点校准协议，在各种样品基质中可实现 ±0.2 pH 的准确度。然而，通过使用基质匹配标准，可以降低偏置误差并将准确度提高到 ±0.1 pH，与商业玻璃 pH 传感器相比。然后，通过非熟练用户的低通量分析对所开发的传感器和测量协议进行了合理化。
