Effect of selected calculation routines and dissociation constants on the determination of total carbon dioxide in seawater
During the 1989 and 1990 JGOFS North Atlantic Pilot Study a comparison was made between the Coulometric and the acid titration method for determination of total carbon dioxide (TCO2) in seawater. TCO2 and alkalinity have been calculated from acid titration using either the modified Gran plot or the...
Published in: | Deep Sea Research Part I: Oceanographic Research Papers |
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Language: | English |
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1993
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Online Access: | https://hdl.handle.net/11370/da649355-a66f-41c1-ad12-bf237490529b https://research.rug.nl/en/publications/da649355-a66f-41c1-ad12-bf237490529b https://doi.org/10.1016/0967-0637(93)90139-T https://pure.rug.nl/ws/files/3301884/1993DeepSeaRes1Stoll.pdf |
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ftunigroningenpu:oai:pure.rug.nl:publications/da649355-a66f-41c1-ad12-bf237490529b 2024-02-04T10:02:38+01:00 Effect of selected calculation routines and dissociation constants on the determination of total carbon dioxide in seawater Stoll, M.H.C. Rommets, J.W. Baar, H.J.W. de 1993 application/pdf https://hdl.handle.net/11370/da649355-a66f-41c1-ad12-bf237490529b https://research.rug.nl/en/publications/da649355-a66f-41c1-ad12-bf237490529b https://doi.org/10.1016/0967-0637(93)90139-T https://pure.rug.nl/ws/files/3301884/1993DeepSeaRes1Stoll.pdf eng eng https://research.rug.nl/en/publications/da649355-a66f-41c1-ad12-bf237490529b info:eu-repo/semantics/openAccess Stoll , M H C , Rommets , J W & Baar , H J W D 1993 , ' Effect of selected calculation routines and dissociation constants on the determination of total carbon dioxide in seawater ' , Deep Sea Research Part I. Oceanographic Research Papers , vol. 40 , no. 6 , pp. 1307-1322 . https://doi.org/10.1016/0967-0637(93)90139-T article 1993 ftunigroningenpu https://doi.org/10.1016/0967-0637(93)90139-T 2024-01-10T23:28:14Z During the 1989 and 1990 JGOFS North Atlantic Pilot Study a comparison was made between the Coulometric and the acid titration method for determination of total carbon dioxide (TCO2) in seawater. TCO2 and alkalinity have been calculated from acid titration using either the modified Gran plot or the curve-fitting routine. Depth profiles showed fair agreement (on average 0.6% or about 12.5 μmol l−1) between the TCO2 calculated from the acid titration method and the TCO2 measured independently by Coulometry. It is shown that different data processing routines combined with the proper use of dissociation constants can influence the acid titration result considerably. There appears to be a slight offset between calculated and Coulometric data which is smallest when using combined dissociation constants. No statistically significant difference could be found between the two used calculation methods (Gran plot and curve-fitting). The agreement between the independent methods of Coulometry and acid titration is encouraging and furthermore independent of depth, for this dataset there is no reason for invoking the existence of interfering (organic) protolytes. Article in Journal/Newspaper North Atlantic University of Groningen research database Deep Sea Research Part I: Oceanographic Research Papers 40 6 1307 1322 |
institution |
Open Polar |
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University of Groningen research database |
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ftunigroningenpu |
language |
English |
description |
During the 1989 and 1990 JGOFS North Atlantic Pilot Study a comparison was made between the Coulometric and the acid titration method for determination of total carbon dioxide (TCO2) in seawater. TCO2 and alkalinity have been calculated from acid titration using either the modified Gran plot or the curve-fitting routine. Depth profiles showed fair agreement (on average 0.6% or about 12.5 μmol l−1) between the TCO2 calculated from the acid titration method and the TCO2 measured independently by Coulometry. It is shown that different data processing routines combined with the proper use of dissociation constants can influence the acid titration result considerably. There appears to be a slight offset between calculated and Coulometric data which is smallest when using combined dissociation constants. No statistically significant difference could be found between the two used calculation methods (Gran plot and curve-fitting). The agreement between the independent methods of Coulometry and acid titration is encouraging and furthermore independent of depth, for this dataset there is no reason for invoking the existence of interfering (organic) protolytes. |
format |
Article in Journal/Newspaper |
author |
Stoll, M.H.C. Rommets, J.W. Baar, H.J.W. de |
spellingShingle |
Stoll, M.H.C. Rommets, J.W. Baar, H.J.W. de Effect of selected calculation routines and dissociation constants on the determination of total carbon dioxide in seawater |
author_facet |
Stoll, M.H.C. Rommets, J.W. Baar, H.J.W. de |
author_sort |
Stoll, M.H.C. |
title |
Effect of selected calculation routines and dissociation constants on the determination of total carbon dioxide in seawater |
title_short |
Effect of selected calculation routines and dissociation constants on the determination of total carbon dioxide in seawater |
title_full |
Effect of selected calculation routines and dissociation constants on the determination of total carbon dioxide in seawater |
title_fullStr |
Effect of selected calculation routines and dissociation constants on the determination of total carbon dioxide in seawater |
title_full_unstemmed |
Effect of selected calculation routines and dissociation constants on the determination of total carbon dioxide in seawater |
title_sort |
effect of selected calculation routines and dissociation constants on the determination of total carbon dioxide in seawater |
publishDate |
1993 |
url |
https://hdl.handle.net/11370/da649355-a66f-41c1-ad12-bf237490529b https://research.rug.nl/en/publications/da649355-a66f-41c1-ad12-bf237490529b https://doi.org/10.1016/0967-0637(93)90139-T https://pure.rug.nl/ws/files/3301884/1993DeepSeaRes1Stoll.pdf |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Stoll , M H C , Rommets , J W & Baar , H J W D 1993 , ' Effect of selected calculation routines and dissociation constants on the determination of total carbon dioxide in seawater ' , Deep Sea Research Part I. Oceanographic Research Papers , vol. 40 , no. 6 , pp. 1307-1322 . https://doi.org/10.1016/0967-0637(93)90139-T |
op_relation |
https://research.rug.nl/en/publications/da649355-a66f-41c1-ad12-bf237490529b |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/0967-0637(93)90139-T |
container_title |
Deep Sea Research Part I: Oceanographic Research Papers |
container_volume |
40 |
container_issue |
6 |
container_start_page |
1307 |
op_container_end_page |
1322 |
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1789969448890793984 |