Accurate pH measurement and determination in deep-sea environments by an in-situ pH sensor calibration device

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

An in-situ calibration method to accurately and precisely constrain the pH of deep sea environments is reported. This method involves the pre-evaluation of the Ir-IrOx|Ag-AgCl electrode in the laboratory, followed by the in situ calibration using pH buffers at the ocean bottom. The standard potential E° and in situ slope are derived by the calibration process. This calibration method was implemented in an in situ calibration device (pH Calibrator) and used in the seawater column and hydrothermal diffuse flow measurements. The precision, accuracy and stability of the pH value determined are sufficient for many geochemical processes.

Original languageEnglish (US)
Title of host publicationOCEANS 2016 - Shanghai
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781467397247
DOIs
StatePublished - Jun 3 2016
EventOCEANS 2016 - Shanghai - Shanghai, China
Duration: Apr 10 2016Apr 13 2016

Publication series

NameOCEANS 2016 - Shanghai

Other

OtherOCEANS 2016 - Shanghai
CountryChina
CityShanghai
Period4/10/164/13/16

Keywords

  • calibration
  • deep sea
  • hydrothermal
  • in situ
  • pH

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  • Cite this

    Tan, C., Ding, K., Yang, W., & Seyfried, W. E. (2016). Accurate pH measurement and determination in deep-sea environments by an in-situ pH sensor calibration device. In OCEANS 2016 - Shanghai [7485352] (OCEANS 2016 - Shanghai). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/OCEANSAP.2016.7485352