High-Precision Measurements of 44 Ca/ 40 Ca Using Multiple-Collector Inductively Coupled Plasma Mass Spectrometry without Collision-Cell Technology
Herein, we present a new method for determining the Ca isotopic composition of geological samples. To eliminate matrix elements from Ca, a column chromatography method was developed using a , , ' ' tetraoctyl-1,5-diglycolamide (TODGA) resin. The Ca isotopic compositions were measured by a...
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| Veröffentlicht in: | Analytical chemistry (Washington) 2024-04, Vol.96 (16), p.6131-6138 |
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| container_title | Analytical chemistry (Washington) |
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| creator | Gu, Hai-Ou Liu, Xiya Sun, He Sun, Guochao Li, Dongyong Wang, Fangyue Ge, Can Fan, Yu Zhou, Taofa |
| description | Herein, we present a new method for determining the Ca isotopic composition of geological samples. To eliminate matrix elements from Ca, a column chromatography method was developed using a
,
,
'
' tetraoctyl-1,5-diglycolamide (TODGA) resin. The Ca isotopic compositions were measured by a multiple collector inductively coupled plasma mass spectrometry (MC-ICP-MS) without collision cell equipment, especially that direct measurement to
Ca/
Ca can be achieved. To mitigate the interference from
Ar during
Ca measurement, the cold plasma technique was used to suppress the Ar
generation, resulting in a background Ar
intensity of |
| doi_str_mv | 10.1021/acs.analchem.3c04823 |
| format | Article |
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,
,
'
' tetraoctyl-1,5-diglycolamide (TODGA) resin. The Ca isotopic compositions were measured by a multiple collector inductively coupled plasma mass spectrometry (MC-ICP-MS) without collision cell equipment, especially that direct measurement to
Ca/
Ca can be achieved. To mitigate the interference from
Ar during
Ca measurement, the cold plasma technique was used to suppress the Ar
generation, resulting in a background Ar
intensity of <300 mV, in contrast to the conventional hot plasma conditions, which typically yield thousands of volts for Ar
intensities. Given the potential for a concentration mismatch between the sample and bracketed standard solutions to cause an intensive shift in measured Ca isotopic compositions, a correction for the [Ca] match is needed. To avoid matrix effects arising from residue matrix elements, it is crucial to limit the concentrations below 1% of Ca for most matrix elements (including Al, Mg, K, Na, and Sr) and below 1‰ for Fe. Notably, the tolerance of residue Sr is effectively improved compared to measurements with CC-MC-ICP-MS and traditional Hot-plasma-SSB-MC-ICP-MS methods with the conventional hot plasma technique, thereby lowering the complexity of column chemistry. The measured δ
Ca, δ
Ca, and ε
Ca values for eight reference materials agree well with previously reported values within analytical uncertainties. This method demonstrates long-term precision is better than 0.10‰ (two standard deviations) for both δ values (i.e., δ
Ca and δ
Ca). We anticipate that the proposed method will benefit the growth of the Ca isotope data set and foster an increase in the application of Ca isotope in Earth science studies.</description><identifier>ISSN: 0003-2700</identifier><identifier>EISSN: 1520-6882</identifier><identifier>DOI: 10.1021/acs.analchem.3c04823</identifier><identifier>PMID: 38597518</identifier><language>eng</language><publisher>United States</publisher><ispartof>Analytical chemistry (Washington), 2024-04, Vol.96 (16), p.6131-6138</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><cites>FETCH-LOGICAL-c688-71c895223f054796925efcc61922f110e843ba6f346b7caa612c6fff77ebc6ec3</cites><orcidid>0000-0002-8476-2621</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,2765,27924,27925</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/38597518$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Gu, Hai-Ou</creatorcontrib><creatorcontrib>Liu, Xiya</creatorcontrib><creatorcontrib>Sun, He</creatorcontrib><creatorcontrib>Sun, Guochao</creatorcontrib><creatorcontrib>Li, Dongyong</creatorcontrib><creatorcontrib>Wang, Fangyue</creatorcontrib><creatorcontrib>Ge, Can</creatorcontrib><creatorcontrib>Fan, Yu</creatorcontrib><creatorcontrib>Zhou, Taofa</creatorcontrib><title>High-Precision Measurements of 44 Ca/ 40 Ca Using Multiple-Collector Inductively Coupled Plasma Mass Spectrometry without Collision-Cell Technology</title><title>Analytical chemistry (Washington)</title><addtitle>Anal Chem</addtitle><description>Herein, we present a new method for determining the Ca isotopic composition of geological samples. To eliminate matrix elements from Ca, a column chromatography method was developed using a
,
,
'
' tetraoctyl-1,5-diglycolamide (TODGA) resin. The Ca isotopic compositions were measured by a multiple collector inductively coupled plasma mass spectrometry (MC-ICP-MS) without collision cell equipment, especially that direct measurement to
Ca/
Ca can be achieved. To mitigate the interference from
Ar during
Ca measurement, the cold plasma technique was used to suppress the Ar
generation, resulting in a background Ar
intensity of <300 mV, in contrast to the conventional hot plasma conditions, which typically yield thousands of volts for Ar
intensities. Given the potential for a concentration mismatch between the sample and bracketed standard solutions to cause an intensive shift in measured Ca isotopic compositions, a correction for the [Ca] match is needed. To avoid matrix effects arising from residue matrix elements, it is crucial to limit the concentrations below 1% of Ca for most matrix elements (including Al, Mg, K, Na, and Sr) and below 1‰ for Fe. Notably, the tolerance of residue Sr is effectively improved compared to measurements with CC-MC-ICP-MS and traditional Hot-plasma-SSB-MC-ICP-MS methods with the conventional hot plasma technique, thereby lowering the complexity of column chemistry. The measured δ
Ca, δ
Ca, and ε
Ca values for eight reference materials agree well with previously reported values within analytical uncertainties. This method demonstrates long-term precision is better than 0.10‰ (two standard deviations) for both δ values (i.e., δ
Ca and δ
Ca). We anticipate that the proposed method will benefit the growth of the Ca isotope data set and foster an increase in the application of Ca isotope in Earth science studies.</description><issn>0003-2700</issn><issn>1520-6882</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2024</creationdate><recordtype>article</recordtype><recordid>eNo9kE1OwzAQRi0EoqVwA4R8gbT-SZxkiSKglVpRibKOHHfcBDlxZCegnIMLk9LC6lvMvBl9D6F7SuaUMLqQys9lI40qoZ5zRcKE8Qs0pREjgUgSdommhBAesJiQCbrx_oMQSgkV12jCkyiNI5pM0feyOpTB1oGqfGUbvAHpewc1NJ3HVuMwxJlc4JCMgd991Rzwpjdd1RoIMmsMqM46vGr2veqqTzADzmw_Dvd4a6SvJd5I7_FbO-45W0PnBvxVdaXtO3zEf58GGRiDd6DKxhp7GG7RlZbGw905Z2j3_LTLlsH69WWVPa4DNfYLYqqSNGKMaxKFcSpSFoFWStCUMT0WhSTkhRSah6KIlZSCMiW01nEMhRKg-AyFp7PKWe8d6Lx1VS3dkFOSHxXno-L8T3F-VjxiDyes7Ysa9v_Qn1P-A3MifTg</recordid><startdate>20240423</startdate><enddate>20240423</enddate><creator>Gu, Hai-Ou</creator><creator>Liu, Xiya</creator><creator>Sun, He</creator><creator>Sun, Guochao</creator><creator>Li, Dongyong</creator><creator>Wang, Fangyue</creator><creator>Ge, Can</creator><creator>Fan, Yu</creator><creator>Zhou, Taofa</creator><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><orcidid>https://orcid.org/0000-0002-8476-2621</orcidid></search><sort><creationdate>20240423</creationdate><title>High-Precision Measurements of 44 Ca/ 40 Ca Using Multiple-Collector Inductively Coupled Plasma Mass Spectrometry without Collision-Cell Technology</title><author>Gu, Hai-Ou ; Liu, Xiya ; Sun, He ; Sun, Guochao ; Li, Dongyong ; Wang, Fangyue ; Ge, Can ; Fan, Yu ; Zhou, Taofa</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c688-71c895223f054796925efcc61922f110e843ba6f346b7caa612c6fff77ebc6ec3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2024</creationdate><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Gu, Hai-Ou</creatorcontrib><creatorcontrib>Liu, Xiya</creatorcontrib><creatorcontrib>Sun, He</creatorcontrib><creatorcontrib>Sun, Guochao</creatorcontrib><creatorcontrib>Li, Dongyong</creatorcontrib><creatorcontrib>Wang, Fangyue</creatorcontrib><creatorcontrib>Ge, Can</creatorcontrib><creatorcontrib>Fan, Yu</creatorcontrib><creatorcontrib>Zhou, Taofa</creatorcontrib><collection>PubMed</collection><collection>CrossRef</collection><jtitle>Analytical chemistry (Washington)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Gu, Hai-Ou</au><au>Liu, Xiya</au><au>Sun, He</au><au>Sun, Guochao</au><au>Li, Dongyong</au><au>Wang, Fangyue</au><au>Ge, Can</au><au>Fan, Yu</au><au>Zhou, Taofa</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>High-Precision Measurements of 44 Ca/ 40 Ca Using Multiple-Collector Inductively Coupled Plasma Mass Spectrometry without Collision-Cell Technology</atitle><jtitle>Analytical chemistry (Washington)</jtitle><addtitle>Anal Chem</addtitle><date>2024-04-23</date><risdate>2024</risdate><volume>96</volume><issue>16</issue><spage>6131</spage><epage>6138</epage><pages>6131-6138</pages><issn>0003-2700</issn><eissn>1520-6882</eissn><abstract>Herein, we present a new method for determining the Ca isotopic composition of geological samples. To eliminate matrix elements from Ca, a column chromatography method was developed using a
,
,
'
' tetraoctyl-1,5-diglycolamide (TODGA) resin. The Ca isotopic compositions were measured by a multiple collector inductively coupled plasma mass spectrometry (MC-ICP-MS) without collision cell equipment, especially that direct measurement to
Ca/
Ca can be achieved. To mitigate the interference from
Ar during
Ca measurement, the cold plasma technique was used to suppress the Ar
generation, resulting in a background Ar
intensity of <300 mV, in contrast to the conventional hot plasma conditions, which typically yield thousands of volts for Ar
intensities. Given the potential for a concentration mismatch between the sample and bracketed standard solutions to cause an intensive shift in measured Ca isotopic compositions, a correction for the [Ca] match is needed. To avoid matrix effects arising from residue matrix elements, it is crucial to limit the concentrations below 1% of Ca for most matrix elements (including Al, Mg, K, Na, and Sr) and below 1‰ for Fe. Notably, the tolerance of residue Sr is effectively improved compared to measurements with CC-MC-ICP-MS and traditional Hot-plasma-SSB-MC-ICP-MS methods with the conventional hot plasma technique, thereby lowering the complexity of column chemistry. The measured δ
Ca, δ
Ca, and ε
Ca values for eight reference materials agree well with previously reported values within analytical uncertainties. This method demonstrates long-term precision is better than 0.10‰ (two standard deviations) for both δ values (i.e., δ
Ca and δ
Ca). We anticipate that the proposed method will benefit the growth of the Ca isotope data set and foster an increase in the application of Ca isotope in Earth science studies.</abstract><cop>United States</cop><pmid>38597518</pmid><doi>10.1021/acs.analchem.3c04823</doi><tpages>8</tpages><orcidid>https://orcid.org/0000-0002-8476-2621</orcidid></addata></record> |
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| language | eng |
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| source | American Chemical Society Journals |
| title | High-Precision Measurements of 44 Ca/ 40 Ca Using Multiple-Collector Inductively Coupled Plasma Mass Spectrometry without Collision-Cell Technology |
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