Title

Application of all solid-state 3D printed pH sensor to beverage samples using matrix matched standard

Document Type

Journal Article

Publisher

Elsevier B.V.

School

Electron Science Research Institute

Comments

Originally published as:

Lonsdale, W., Shylendra, S. P., Wajrak, M., & Alameh, K. (2018). Application of all solid-state 3D printed pH sensor to beverage samples using matrix matched standard. Talanta, 196, 18-21.

Original article available here.

Abstract

In this work, an all solid-state potentiometric pH sensor is developed, which employs a thin-film sputter deposited RuO2 working electrode, a polyvinylbutyral-SiO2 modified RuO2 reference electrode and 3D printed electrode housing. The developed sensor exhibits linear pH response (− 55.7 mV/pH, R2 = 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.

DOI

10.1016/j.talanta.2018.12.037

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