Journal of Physical Science, Vol. 28(2), 161–179, 2017 © Penerbit Universiti Sains Malaysia, 2017. This work is licensed under the terms of the Creative Commons Attribution (CC BY) (http://creativecommons.org/licenses/by/4.0/). Development of Solid-state Reference Electrode Based on Sodium Polyanethol Sulfonate Immobilised on Cellulose Acetate Sagir Alva, 1* Aiman Aziz, 2 Mohd Ismahadi Syono 3 and Darwin Sebayang 1 1 Mechanical Engineering Department, Faculty of Engineering, Universitas Mercu Buana, Jl. Meruya Selatan No. 01, Kembangan, Jakarta-11650, Indonesia 2 Photonics R&D, MIMOS Semiconductor (M) Sdn Bhd, Technology Park Malaysia, 57000 Kuala Lumpur, Malaysia 3 Advanced Devices Lab, MIMOS Semiconductor (M) Sdn Bhd, Technology Park Malaysia, 57000 Kuala Lumpur, Malaysia * Corresponding author: sagir.alva@mercubuana.ac.id Published online: 15 August 2017 To cite this article: Alva, S. et al. (2017). Development of solid-state reference electrode based on sodium polyanethol sulfonate immobilised on cellulose acetate. J. Phys. Sci., 28(2), 161–179, https://doi.org/10.21315/jps2017.28.2.11 To link to this article: https://doi.org/10.21315/jps2017.28.2.11 ABSTRACT: In this study, we successfully developed a solid-state reference electrode based on sodium polyanethol sulfonate (SPS) immobilised on a cellulose acetate membrane and coated on a layer of polypyrrole on top of a carbon screen-printed electrode (SPE). We varied the concentration of SPS salt from 1% to 5% (w/v) and achieved an optimal concentration of 4%. SPS optimisation test was performed by varying concentrations of KCl and pH buffer solution. The slope obtained for 4% SPS was 3.5 ± 0.3 with a residual standard deviation (RSD) of 9.3% of KCl solution, whereas the slope obtained for pH buffer solution was 3.4 ± 0.2 with 1.2% RSD. The stability test in pH 7 buffer and 10 −3 M KCl yielded drift at <0.4 mV/h for 60 h of continuous monitoring. We also performed tests using standard NH 4 +, K+ and NO 3 − ion-selective electrode sensors, and the slopes measured were respectively 52.4 ± 0.4, 51.4 ± 0.4, and −52.3 ± 0.9 mV/dec with a dynamic range of 0.1–10 −5 M. Keywords: Solid-state reference electrode, poly (anethol sulfonic acid), cellulose acetate, screen-printed electrode, sodium polyanethol