Ocean Science
Ocean Science
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Articles | Volume 22, issue 3
Articles | Volume 22, issue 3
https://doi.org/10.5194/os-22-1609-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/os-22-1609-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 22, issue 3
Technical note
 | 
21 May 2026
Technical note |  | 21 May 2026

Obtaining accurate, high-frequency and long-term seawater pH data by using coupled lab-on-chip and optode sensing technologies

Anthony J. Lucio, Dirk Koopmans, Martin Arundell, Socratis Loucaides, and Allison Schaap

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Short summary
Overall, this work provides the community with guidelines on how to achieve accurate (e.g., difference ~0.02 relative to validation samples), rapid (e.g., <1 minute per measurement) and long-term (e.g., 6-month) pH measurements, while balancing power requirements, by combining two complementary pH sensing technologies. We present a data correction method to account for sensor signal drift and demonstrate this in a challenging (i.e., significant biofouling) shallow water field deployment.
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