NDLI: Development of electrochemical in-situ pH-pCO sensor for deep-sea oceanography applications

Content Provider	IEEE Xplore Digital Library
Author	Shitashima, K. Koike, Y. Kyo, M. Hemmi, A.
Copyright Year	2008
Description	Author affiliation: Civil Eng. Res. & Environ. Studies Inc., Abiko (Koike, Y.) \|\| Environ. Sci. Res. Lab., Central Res. Inst. of Electr. Power Ind., Abiko (Shitashima, K.) \|\| Center for Deep Earth Exploration, Japan Agency for Marine-Earth Sci. & Technol., Yokosuka (Kyo, M.) \|\| Mebius Adv. Technol. (Hemmi, A.)
Abstract	In recent years, in-situ measurement using pH and $pCO_{2}$ sensors has attracted attention in relation to global warming issues. The high precision electrochemical in-situ $pH-pCO_{2}$ sensor was developed for measurement of these parameters in seawater. A new pH sensor was used an ion sensitive field effect transistor for the pH electrode and a chlorine ion selective electrode for the reference electrode. For a new $pCO_{2}$ sensor, the pH sensor was sealed with a gas permeable membrane filled with inner solution. The pH sensor can detect $pCO_{2}$ change as the inner solution pH changes which is caused by penetration of carbon dioxide through the membrane. Several sea tests using this sensor were carried out in various locations of the ocean. High accuracy, quick response, and long-term stability have been achieved. In the field, response speed of the pH sensor is 1 second or less, and measurement accuracy is plusmn0.005 pH. In-situ response time of the $pCO_{2}$ sensor was less than 60 seconds.
Starting Page	1414
Ending Page	1417
File Size	954647
Page Count	4
File Format	PDF
ISBN	9781424425808
ISSN	19300395
DOI	10.1109/ICSENS.2008.4716711
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-10-26
Publisher Place	Italy
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Gas detectors Sea measurements Electrodes Biomembranes Global warming FETs Carbon dioxide Testing Oceans Stability
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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