Analysis of trace metals (Cu, Cd, Pb, and Fe) in seawater using single batch nitrilotriacetate resin extraction and isotope dilution inductively coupled plasma mass spectrometry
A simple and accurate low-blank method has been developed for the analysis of total dissolved copper, cadmium, lead, and iron in a small volume (1.3–1.5 mL per element) of seawater. Pre-concentration and salt-separation of a stable isotope spiked sample are achieved by single batch extraction onto n...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | en_US |
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Elsevier
2016
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| Online Access: | http://hdl.handle.net/1721.1/103932 https://orcid.org/0000-0002-6394-1866 |
| _version_ | 1826218169355730944 |
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| author | Lee, Jong-Mi Fitzsimmons, Jessica Nicole Zhang, Ruifeng Boyle, Edward A Echegoyen Sanz, Yolanda Kayser, Richard A |
| author2 | Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences |
| author_facet | Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Lee, Jong-Mi Fitzsimmons, Jessica Nicole Zhang, Ruifeng Boyle, Edward A Echegoyen Sanz, Yolanda Kayser, Richard A |
| author_sort | Lee, Jong-Mi |
| collection | MIT |
| description | A simple and accurate low-blank method has been developed for the analysis of total dissolved copper, cadmium, lead, and iron in a small volume (1.3–1.5 mL per element) of seawater. Pre-concentration and salt-separation of a stable isotope spiked sample are achieved by single batch extraction onto nitrilotriacetate (NTA)-type Superflow® chelating resin beads (100–2400 beads depending on the element). Metals are released into 0.1–0.5 M HNO[subscript 3], and trace metal isotope ratios are determined by ICPMS. The benefit of this method compared to our previous Mg(OH)2 coprecipitation method is that the final matrix is very dilute so cone-clogging and matrix sensitivity suppression are minimal, while still retaining the high accuracy of the isotope dilution technique. Recovery efficiencies are sensitive to sample pH, number of resin beads added, and the length of time allowed for sample–resin binding and elution; these factors are optimized for each element to yield the highest recovery. The method has a low procedural blank and high sensitivity sufficient for the analysis of pM–nM open-ocean trace metal concentrations. Application of this method to samples from the Bermuda Atlantic Time-Series Study station provides oceanographically consistent Cu, Cd, Pb, and Fe profiles that are in good agreement with other reliable data for this site. In addition, the method can potentially be modified for the simultaneous analysis of multiple elements, which will be beneficial for the analysis of large number of samples. |
| first_indexed | 2024-09-23T17:15:36Z |
| format | Article |
| id | mit-1721.1/103932 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T17:15:36Z |
| publishDate | 2016 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | mit-1721.1/1039322024-05-15T02:21:35Z Analysis of trace metals (Cu, Cd, Pb, and Fe) in seawater using single batch nitrilotriacetate resin extraction and isotope dilution inductively coupled plasma mass spectrometry Lee, Jong-Mi Fitzsimmons, Jessica Nicole Zhang, Ruifeng Boyle, Edward A Echegoyen Sanz, Yolanda Kayser, Richard A Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Boyle, Edward A. Lee, Jong-Mi Boyle, Edward A. Echegoyen-Sanz, Yolanda Fitzsimmons, Jessica Nicole Kayser, Richard A. A simple and accurate low-blank method has been developed for the analysis of total dissolved copper, cadmium, lead, and iron in a small volume (1.3–1.5 mL per element) of seawater. Pre-concentration and salt-separation of a stable isotope spiked sample are achieved by single batch extraction onto nitrilotriacetate (NTA)-type Superflow® chelating resin beads (100–2400 beads depending on the element). Metals are released into 0.1–0.5 M HNO[subscript 3], and trace metal isotope ratios are determined by ICPMS. The benefit of this method compared to our previous Mg(OH)2 coprecipitation method is that the final matrix is very dilute so cone-clogging and matrix sensitivity suppression are minimal, while still retaining the high accuracy of the isotope dilution technique. Recovery efficiencies are sensitive to sample pH, number of resin beads added, and the length of time allowed for sample–resin binding and elution; these factors are optimized for each element to yield the highest recovery. The method has a low procedural blank and high sensitivity sufficient for the analysis of pM–nM open-ocean trace metal concentrations. Application of this method to samples from the Bermuda Atlantic Time-Series Study station provides oceanographically consistent Cu, Cd, Pb, and Fe profiles that are in good agreement with other reliable data for this site. In addition, the method can potentially be modified for the simultaneous analysis of multiple elements, which will be beneficial for the analysis of large number of samples. National Science Foundation (U.S.) (NSF frant OCE-0751409) Kuwait Foundation for the Advancement of Sciences National Science Foundation (U.S.) (NSF award OCE-0751409) National Science Foundation (U.S.) (NSF award OCE-0926197) 2016-08-16T16:34:40Z 2016-08-16T16:34:40Z 2010-12 2010-11 Article http://purl.org/eprint/type/JournalArticle 00032670 http://hdl.handle.net/1721.1/103932 Lee, Jong-Mi, Edward A. Boyle, Yolanda Echegoyen-Sanz, Jessica N. Fitzsimmons, Ruifeng Zhang, and Richard A. Kayser. “Analysis of Trace Metals (Cu, Cd, Pb, and Fe) in Seawater Using Single Batch Nitrilotriacetate Resin Extraction and Isotope Dilution Inductively Coupled Plasma Mass Spectrometry.” Analytica Chimica Acta 686, no. 1–2 (February 2011): 93–101. https://orcid.org/0000-0002-6394-1866 en_US http://dx.doi.org/10.1016/j.aca.2010.11.052 Analytica Chimica Acta Creative Commons Attribution-NonCommercial-NoDerivs License http://creativecommons.org/licenses/by-nc-nd/4.0/ application/pdf Elsevier Prof. Boyle via Chris Sherratt |
| spellingShingle | Lee, Jong-Mi Fitzsimmons, Jessica Nicole Zhang, Ruifeng Boyle, Edward A Echegoyen Sanz, Yolanda Kayser, Richard A Analysis of trace metals (Cu, Cd, Pb, and Fe) in seawater using single batch nitrilotriacetate resin extraction and isotope dilution inductively coupled plasma mass spectrometry |
| title | Analysis of trace metals (Cu, Cd, Pb, and Fe) in seawater using single batch nitrilotriacetate resin extraction and isotope dilution inductively coupled plasma mass spectrometry |
| title_full | Analysis of trace metals (Cu, Cd, Pb, and Fe) in seawater using single batch nitrilotriacetate resin extraction and isotope dilution inductively coupled plasma mass spectrometry |
| title_fullStr | Analysis of trace metals (Cu, Cd, Pb, and Fe) in seawater using single batch nitrilotriacetate resin extraction and isotope dilution inductively coupled plasma mass spectrometry |
| title_full_unstemmed | Analysis of trace metals (Cu, Cd, Pb, and Fe) in seawater using single batch nitrilotriacetate resin extraction and isotope dilution inductively coupled plasma mass spectrometry |
| title_short | Analysis of trace metals (Cu, Cd, Pb, and Fe) in seawater using single batch nitrilotriacetate resin extraction and isotope dilution inductively coupled plasma mass spectrometry |
| title_sort | analysis of trace metals cu cd pb and fe in seawater using single batch nitrilotriacetate resin extraction and isotope dilution inductively coupled plasma mass spectrometry |
| url | http://hdl.handle.net/1721.1/103932 https://orcid.org/0000-0002-6394-1866 |
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