Sampling and onboard analytical methods for determining subnanomolar concentrations of zinc in seawater
Abstract Zinc (Zn) is an essential micronutrient for bacteria and phytoplankton in the ocean. However, seawater samples for Zn measurements are highly prone to contamination due to the ubiquity of Zn in laboratories and research vessels. To identify a potential Zn contamination problem during a rese...
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crwiley:10.1002/lom3.10004 2024-09-30T14:44:27+00:00 Sampling and onboard analytical methods for determining subnanomolar concentrations of zinc in seawater Kim, Taejin Obata, Hajime Gamo, Toshitaka Nishioka, Jun 2015 http://dx.doi.org/10.1002/lom3.10004 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Flom3.10004 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lom3.10004 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Limnology and Oceanography: Methods volume 13, issue 1, page 30-39 ISSN 1541-5856 1541-5856 journal-article 2015 crwiley https://doi.org/10.1002/lom3.10004 2024-09-11T04:12:33Z Abstract Zinc (Zn) is an essential micronutrient for bacteria and phytoplankton in the ocean. However, seawater samples for Zn measurements are highly prone to contamination due to the ubiquity of Zn in laboratories and research vessels. To identify a potential Zn contamination problem during a research cruise to the subarctic North Pacific, we compared three operational sampling approaches for trace Zn in seawater. Acid‐cleaned Niskin‐X samplers were: (1) deployed on a conductivity–temperature‐depth carousel multisampling system (CTD‐CMS) launched at the vessel's starboard side, (2) attached to a Kevlar wire lowered at the vessel's stern, and (3) attached to a Ti wire lowered from a starboard position. Zn contamination in the case of Kevlar wire hydrocasts was problematic for samples from ≤400 m because Zn is used as a sacrificial anode for the ship's propeller shaft and for the pipes of the seawater cooling system. In deep waters, consistent Zn concentrations were found using the three different sampling methods. Based on the clean seawater sampling with CTD‐CMS and the onboard analytical method, vertical profiles of dissolved Zn were then obtained. These profiles were compared with those of Si in the subarctic North Pacific. Both Zn and Si concentrations showed a clear west–east gradient in shallow waters. Article in Journal/Newspaper Subarctic Wiley Online Library Pacific Limnology and Oceanography: Methods 13 1 30 39 |
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English |
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Abstract Zinc (Zn) is an essential micronutrient for bacteria and phytoplankton in the ocean. However, seawater samples for Zn measurements are highly prone to contamination due to the ubiquity of Zn in laboratories and research vessels. To identify a potential Zn contamination problem during a research cruise to the subarctic North Pacific, we compared three operational sampling approaches for trace Zn in seawater. Acid‐cleaned Niskin‐X samplers were: (1) deployed on a conductivity–temperature‐depth carousel multisampling system (CTD‐CMS) launched at the vessel's starboard side, (2) attached to a Kevlar wire lowered at the vessel's stern, and (3) attached to a Ti wire lowered from a starboard position. Zn contamination in the case of Kevlar wire hydrocasts was problematic for samples from ≤400 m because Zn is used as a sacrificial anode for the ship's propeller shaft and for the pipes of the seawater cooling system. In deep waters, consistent Zn concentrations were found using the three different sampling methods. Based on the clean seawater sampling with CTD‐CMS and the onboard analytical method, vertical profiles of dissolved Zn were then obtained. These profiles were compared with those of Si in the subarctic North Pacific. Both Zn and Si concentrations showed a clear west–east gradient in shallow waters. |
format |
Article in Journal/Newspaper |
author |
Kim, Taejin Obata, Hajime Gamo, Toshitaka Nishioka, Jun |
spellingShingle |
Kim, Taejin Obata, Hajime Gamo, Toshitaka Nishioka, Jun Sampling and onboard analytical methods for determining subnanomolar concentrations of zinc in seawater |
author_facet |
Kim, Taejin Obata, Hajime Gamo, Toshitaka Nishioka, Jun |
author_sort |
Kim, Taejin |
title |
Sampling and onboard analytical methods for determining subnanomolar concentrations of zinc in seawater |
title_short |
Sampling and onboard analytical methods for determining subnanomolar concentrations of zinc in seawater |
title_full |
Sampling and onboard analytical methods for determining subnanomolar concentrations of zinc in seawater |
title_fullStr |
Sampling and onboard analytical methods for determining subnanomolar concentrations of zinc in seawater |
title_full_unstemmed |
Sampling and onboard analytical methods for determining subnanomolar concentrations of zinc in seawater |
title_sort |
sampling and onboard analytical methods for determining subnanomolar concentrations of zinc in seawater |
publisher |
Wiley |
publishDate |
2015 |
url |
http://dx.doi.org/10.1002/lom3.10004 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Flom3.10004 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lom3.10004 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Subarctic |
genre_facet |
Subarctic |
op_source |
Limnology and Oceanography: Methods volume 13, issue 1, page 30-39 ISSN 1541-5856 1541-5856 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/lom3.10004 |
container_title |
Limnology and Oceanography: Methods |
container_volume |
13 |
container_issue |
1 |
container_start_page |
30 |
op_container_end_page |
39 |
_version_ |
1811645722826637312 |