Title

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

Document Type

Journal Article

Publication Title

Talanta

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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