Journal
IEEE SENSORS JOURNAL
Volume 22, Issue 12, Pages 11474-11479Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSEN.2022.3172717
Keywords
Electrodes; Sensors; Gold; Polymers; Hydrogen; Coatings; Biomembranes; Ion-selective electrodes; pH sensor; ionophore; polyaniline
Funding
- A*STAR/Singapore Accelerate Technologies [ACCL/19-GAP090-R20A-D]
Ask authors/readers for more resources
This paper evaluates pH sensing electrodes based on hydrogen ionophores or pH-sensitive emeraldine-polyaniline. The performance was assessed by measuring sensitivity, dynamic range, conductance, and capacitance. The longevity and stability of the emeraldine-polyaniline-based pH sensor were also evaluated.
pH sensors are widely used in various applications such as agriculture, wastewater monitoring, and biomedical engineering. Solid-state ion-selective electrodes (ISEs) have been developed to enable the miniaturization of pH sensors. This paper evaluated the pH sensing electrodes based on hydrogen ionophores or pH-sensitive emeraldine-polyaniline. A miniaturized leak-free reference electrode was integrated with pH sensing electrodes. A multiple-channel electromotive force recording unit was built to facilitate the measurement of multiple ISEs. The sensitivity and dynamic range were assessed using the pH solutions from pH 1.3 to pH 10. The conductance and capacitance of different ISEs were measured and compared. We evaluated the longevity and stability of the emeraldine-polyaniline-based pH sensor, and the drifting was less than 4 mV/day.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available