Preprints
https://doi.org/10.5194/os-2021-126
https://doi.org/10.5194/os-2021-126
 
24 Jan 2022
24 Jan 2022
Status: this preprint was under review for the journal OS but the revision was not accepted.

Technical Note: Calibration-Free pH Sensing of Ocean and Estuarine Waters

Monica Miranda Mugica1, Christina Day1, Brandon McHale1, Kay Louis McGuinness1, Gareth Lee2, Daisy Pickup2, and Nathan Scott Lawrence1 Monica Miranda Mugica et al.
  • 1ANB Sensors Ltd., 4 Penn Farm, Haslingfield Cambridge, CB23 1JZ, UK
  • 2School of Environmental Sciences, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, UK

Abstract. An electrochemical based, all solid-state, calibration-free pH sensor is presented. The sensor is targeted for monitoring the pH of ocean and estuarine environments covering a salinity range from 10–35 ppt without the need for additional salinity measurements. The sensor performance is demonstrated in both laboratory and field conditions. The field tests were conducted in an estuarine environment close to Oban in Scotland where the sensor was deployed for a period of three days. The sensor was validated against a sampled solution and tested alongside a glass pH sensor. The data highlighted the efficiency of the sensor to monitor the tidal variations of pH in the estuarine environment.

Monica Miranda Mugica et al.

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on os-2021-126', Phil Bresnahan, 01 Feb 2022
    • AC1: 'Reply on RC1', Monica Miranda, 19 Apr 2022
    • AC3: 'Reply on RC1', Monica Miranda, 19 Apr 2022
    • AC4: 'Reply on RC1', Monica Miranda, 19 Apr 2022
    • AC5: 'Reply on RC1', Monica Miranda, 19 Apr 2022
    • AC6: 'Reply on RC1', Monica Miranda, 19 Apr 2022
  • RC2: 'Comment on os-2021-126', Anonymous Referee #2, 14 Feb 2022
    • AC2: 'Reply on RC2', Monica Miranda, 19 Apr 2022
    • AC7: 'Reply on RC2', Monica Miranda, 19 Apr 2022
    • AC8: 'Reply on RC2', Monica Miranda, 19 Apr 2022

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on os-2021-126', Phil Bresnahan, 01 Feb 2022
    • AC1: 'Reply on RC1', Monica Miranda, 19 Apr 2022
    • AC3: 'Reply on RC1', Monica Miranda, 19 Apr 2022
    • AC4: 'Reply on RC1', Monica Miranda, 19 Apr 2022
    • AC5: 'Reply on RC1', Monica Miranda, 19 Apr 2022
    • AC6: 'Reply on RC1', Monica Miranda, 19 Apr 2022
  • RC2: 'Comment on os-2021-126', Anonymous Referee #2, 14 Feb 2022
    • AC2: 'Reply on RC2', Monica Miranda, 19 Apr 2022
    • AC7: 'Reply on RC2', Monica Miranda, 19 Apr 2022
    • AC8: 'Reply on RC2', Monica Miranda, 19 Apr 2022

Monica Miranda Mugica et al.

Monica Miranda Mugica et al.

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Short summary
ANB Sensors has developed a novel solid-state technology for monitoring the pH of estuarine environments. It was shown to respond effectively to pH in laboratory environments where the pH of the sea water solution was manipulated by injections of CO2. Field tests were conducted in an estuarine environment close to Oban, Scotland. The sensor was validated against a sampled solution and the data highlighted the efficiency of the sensor to monitor the tidal variations of pH.