Precise determination of seawater calcium using isotope dilution inductively coupled plasma mass spectrometry
NSC, Taiwan We describe a method for rapid, precise and accurate determination of calcium ion (Ca2+) concentration in seawater using isotope dilution inductively coupled plasma mass spectrometry (ID-ICP-MS). A 10 mu L aliquot of seawater was spiked with an appropriate Ca-43 enriched solution for Ca-...
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ROYAL SOC CHEMISTRY
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ftxiamenuniv:oai:dspace.xmu.edu.cn:2288/88204 2023-05-15T14:59:19+02:00 Precise determination of seawater calcium using isotope dilution inductively coupled plasma mass spectrometry Liu, Hou-Chun You, Chen-Feng Cai, Wei-Jun Chung, Chuan-Hsiung Huang, Kuo-Fang Chen, Bao-Shan Li, Yen 李炎 2014 http://dspace.xmu.edu.cn/handle/2288/88204 en_US eng ROYAL SOC CHEMISTRY ANALYST, 2014,139(4):734-741 WOS:000330042500008 http://dspace.xmu.edu.cn/handle/2288/88204 http://dx.doi.org/10.1039/c3an01948a CARBON-CYCLE COMPLEXOMETRIC TITRATION OCEAN ACIDIFICATION SYSTEM CO2 FEEDBACKS MAGNESIUM PACIFIC DIOXIDE Article 2014 ftxiamenuniv 2020-07-21T11:42:44Z NSC, Taiwan We describe a method for rapid, precise and accurate determination of calcium ion (Ca2+) concentration in seawater using isotope dilution inductively coupled plasma mass spectrometry (ID-ICP-MS). A 10 mu L aliquot of seawater was spiked with an appropriate Ca-43 enriched solution for Ca-44/Ca-43 ID-ICP-MS analyses, using an Element XR (Thermo Fisher Scientific), operated at low resolution in E-scan acquisition mode. A standard-sample bracketing technique was applied to correct for potential mass discrimination and ratio drift at every 5 samples. A precision of better than 0.05% for within-run and 0.10% for duplicate measurements of the IAPSO seawater standard was achieved using 10 mu L solutions with a measuring time less than 3 minutes. Depth profiles of seawater samples collected from the Arctic Ocean basin were processed and compared with results obtained by the classic ethylene glycol tetra-acetic acid (EGTA) titration. Our new ID-ICP-MS data agreed closely with the conventional EGTA data, with the latter consistently displaying 1.5% excess Ca2+ values, possibly due to a contribution of interference from Mg2+ and Sr2+ in the EGTA titration. The newly obtained Sr/Ca profiles reveal sensitive water mass mixing in the upper oceanic column to reflect ice melting in the Arctic region. This novel technique provides a tool for seawater Ca2+ determination with small sample size, high throughput, excellent internal precision and external reproducibility. Article in Journal/Newspaper Arctic Arctic Ocean Ocean acidification Xiamen University Institutional Repository Arctic Arctic Ocean Pacific |
institution |
Open Polar |
collection |
Xiamen University Institutional Repository |
op_collection_id |
ftxiamenuniv |
language |
English |
topic |
CARBON-CYCLE COMPLEXOMETRIC TITRATION OCEAN ACIDIFICATION SYSTEM CO2 FEEDBACKS MAGNESIUM PACIFIC DIOXIDE |
spellingShingle |
CARBON-CYCLE COMPLEXOMETRIC TITRATION OCEAN ACIDIFICATION SYSTEM CO2 FEEDBACKS MAGNESIUM PACIFIC DIOXIDE Liu, Hou-Chun You, Chen-Feng Cai, Wei-Jun Chung, Chuan-Hsiung Huang, Kuo-Fang Chen, Bao-Shan Li, Yen 李炎 Precise determination of seawater calcium using isotope dilution inductively coupled plasma mass spectrometry |
topic_facet |
CARBON-CYCLE COMPLEXOMETRIC TITRATION OCEAN ACIDIFICATION SYSTEM CO2 FEEDBACKS MAGNESIUM PACIFIC DIOXIDE |
description |
NSC, Taiwan We describe a method for rapid, precise and accurate determination of calcium ion (Ca2+) concentration in seawater using isotope dilution inductively coupled plasma mass spectrometry (ID-ICP-MS). A 10 mu L aliquot of seawater was spiked with an appropriate Ca-43 enriched solution for Ca-44/Ca-43 ID-ICP-MS analyses, using an Element XR (Thermo Fisher Scientific), operated at low resolution in E-scan acquisition mode. A standard-sample bracketing technique was applied to correct for potential mass discrimination and ratio drift at every 5 samples. A precision of better than 0.05% for within-run and 0.10% for duplicate measurements of the IAPSO seawater standard was achieved using 10 mu L solutions with a measuring time less than 3 minutes. Depth profiles of seawater samples collected from the Arctic Ocean basin were processed and compared with results obtained by the classic ethylene glycol tetra-acetic acid (EGTA) titration. Our new ID-ICP-MS data agreed closely with the conventional EGTA data, with the latter consistently displaying 1.5% excess Ca2+ values, possibly due to a contribution of interference from Mg2+ and Sr2+ in the EGTA titration. The newly obtained Sr/Ca profiles reveal sensitive water mass mixing in the upper oceanic column to reflect ice melting in the Arctic region. This novel technique provides a tool for seawater Ca2+ determination with small sample size, high throughput, excellent internal precision and external reproducibility. |
format |
Article in Journal/Newspaper |
author |
Liu, Hou-Chun You, Chen-Feng Cai, Wei-Jun Chung, Chuan-Hsiung Huang, Kuo-Fang Chen, Bao-Shan Li, Yen 李炎 |
author_facet |
Liu, Hou-Chun You, Chen-Feng Cai, Wei-Jun Chung, Chuan-Hsiung Huang, Kuo-Fang Chen, Bao-Shan Li, Yen 李炎 |
author_sort |
Liu, Hou-Chun |
title |
Precise determination of seawater calcium using isotope dilution inductively coupled plasma mass spectrometry |
title_short |
Precise determination of seawater calcium using isotope dilution inductively coupled plasma mass spectrometry |
title_full |
Precise determination of seawater calcium using isotope dilution inductively coupled plasma mass spectrometry |
title_fullStr |
Precise determination of seawater calcium using isotope dilution inductively coupled plasma mass spectrometry |
title_full_unstemmed |
Precise determination of seawater calcium using isotope dilution inductively coupled plasma mass spectrometry |
title_sort |
precise determination of seawater calcium using isotope dilution inductively coupled plasma mass spectrometry |
publisher |
ROYAL SOC CHEMISTRY |
publishDate |
2014 |
url |
http://dspace.xmu.edu.cn/handle/2288/88204 |
geographic |
Arctic Arctic Ocean Pacific |
geographic_facet |
Arctic Arctic Ocean Pacific |
genre |
Arctic Arctic Ocean Ocean acidification |
genre_facet |
Arctic Arctic Ocean Ocean acidification |
op_source |
http://dx.doi.org/10.1039/c3an01948a |
op_relation |
ANALYST, 2014,139(4):734-741 WOS:000330042500008 http://dspace.xmu.edu.cn/handle/2288/88204 |
_version_ |
1766331428686004224 |