A novel electrochemical calibration setup for oxygen sensors and its use for the stability assessment of Aanderaa optodes
We present a laboratory calibration setup for the individual multi‐point calibration of oxygen sensors. It is based on the electrochemical generation of oxygen in an electrolytic carrier solution. Under thorough control of the conditions, i.e., temperature, carrier solution flow rate, and electrolyt...
Published in: | Limnology and Oceanography: Methods |
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crwiley:10.4319/lom.2012.10.921 2024-06-23T07:56:56+00:00 A novel electrochemical calibration setup for oxygen sensors and its use for the stability assessment of Aanderaa optodes Bittig, Henry C. Fiedler, Björn Steinhoff, Tobias Körtzinger, Arne 2012 http://dx.doi.org/10.4319/lom.2012.10.921 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flom.2012.10.921 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lom.2012.10.921 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Limnology and Oceanography: Methods volume 10, issue 11, page 921-933 ISSN 1541-5856 1541-5856 journal-article 2012 crwiley https://doi.org/10.4319/lom.2012.10.921 2024-06-06T04:22:20Z We present a laboratory calibration setup for the individual multi‐point calibration of oxygen sensors. It is based on the electrochemical generation of oxygen in an electrolytic carrier solution. Under thorough control of the conditions, i.e., temperature, carrier solution flow rate, and electrolytic current, the amount of oxygen is strictly given by Faradays laws and can be controlled to within ± 0.5 µmol L −1 (2 SD). Whereas Winkler samples can be taken for referencing with a reproducibility between triplicates of 0.8 µmol L −1 (2 SD), the calibration setup can provide a Winkler‐free way of referencing with an accuracy of ± 1.2 µmol L −1 (2 SD). Thus calibrated oxygen optodes have been deployed in the Southern Ocean and the Eastern Tropical Atlantic both in profiling and underway mode and confirm the validity of the laboratory calibrations to within few µmol L −1 . In two cases, the optodes drifted between deployments, which was easily identified using the calibration setup. The electrochemical calibration setup may thus facilitate accurate oxygen measurements on a large scale, and its small size makes it possible to configure as a mobile, sea‐going, Winkler‐free system for oxygen sensor calibrations. Article in Journal/Newspaper Southern Ocean Wiley Online Library Southern Ocean Limnology and Oceanography: Methods 10 11 921 933 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
We present a laboratory calibration setup for the individual multi‐point calibration of oxygen sensors. It is based on the electrochemical generation of oxygen in an electrolytic carrier solution. Under thorough control of the conditions, i.e., temperature, carrier solution flow rate, and electrolytic current, the amount of oxygen is strictly given by Faradays laws and can be controlled to within ± 0.5 µmol L −1 (2 SD). Whereas Winkler samples can be taken for referencing with a reproducibility between triplicates of 0.8 µmol L −1 (2 SD), the calibration setup can provide a Winkler‐free way of referencing with an accuracy of ± 1.2 µmol L −1 (2 SD). Thus calibrated oxygen optodes have been deployed in the Southern Ocean and the Eastern Tropical Atlantic both in profiling and underway mode and confirm the validity of the laboratory calibrations to within few µmol L −1 . In two cases, the optodes drifted between deployments, which was easily identified using the calibration setup. The electrochemical calibration setup may thus facilitate accurate oxygen measurements on a large scale, and its small size makes it possible to configure as a mobile, sea‐going, Winkler‐free system for oxygen sensor calibrations. |
format |
Article in Journal/Newspaper |
author |
Bittig, Henry C. Fiedler, Björn Steinhoff, Tobias Körtzinger, Arne |
spellingShingle |
Bittig, Henry C. Fiedler, Björn Steinhoff, Tobias Körtzinger, Arne A novel electrochemical calibration setup for oxygen sensors and its use for the stability assessment of Aanderaa optodes |
author_facet |
Bittig, Henry C. Fiedler, Björn Steinhoff, Tobias Körtzinger, Arne |
author_sort |
Bittig, Henry C. |
title |
A novel electrochemical calibration setup for oxygen sensors and its use for the stability assessment of Aanderaa optodes |
title_short |
A novel electrochemical calibration setup for oxygen sensors and its use for the stability assessment of Aanderaa optodes |
title_full |
A novel electrochemical calibration setup for oxygen sensors and its use for the stability assessment of Aanderaa optodes |
title_fullStr |
A novel electrochemical calibration setup for oxygen sensors and its use for the stability assessment of Aanderaa optodes |
title_full_unstemmed |
A novel electrochemical calibration setup for oxygen sensors and its use for the stability assessment of Aanderaa optodes |
title_sort |
novel electrochemical calibration setup for oxygen sensors and its use for the stability assessment of aanderaa optodes |
publisher |
Wiley |
publishDate |
2012 |
url |
http://dx.doi.org/10.4319/lom.2012.10.921 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flom.2012.10.921 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lom.2012.10.921 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Limnology and Oceanography: Methods volume 10, issue 11, page 921-933 ISSN 1541-5856 1541-5856 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.4319/lom.2012.10.921 |
container_title |
Limnology and Oceanography: Methods |
container_volume |
10 |
container_issue |
11 |
container_start_page |
921 |
op_container_end_page |
933 |
_version_ |
1802650326555164672 |