Precise determination of Cr, Mn, Fe, Co and Ni concentration by an isotope dilution-internal standardization method employing high resolution MC-ICP-MS

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Abstract

A new determination method for Cr, Mn, Fe, Co and Ni in silicate samples by an isotope dilution-internal standardization method (ID-IS)-high resolution (HR)-MC-ICP-MS has been developed. A silicate sample is dissolved into solution, and a Cr-spike solution is added into an aliquot of the sample solution. Then the solution is introduced into HR-MC-ICP-MS without chemical separation. Concentration of Cr is determined by ID, and those of Mn, Fe, Co and Ni are by ID-IS. Matrix effects were examined in detail, and negligible down to a dilution factor (DF; the weight of the sample solution over that of the sample in the solution) of ~3000 for basalt, and ~104 for peridotite and chondrite within an error range of ±1%. ID-IS-HR-MC-ICP-MS showed intermediate precision of ~1% for basalt and chondrite, which is comparable to ID-TIMS for Cr, Fe and Ni, and >10 times better than HR-ICP-MS, suggesting that this method is suitable for precise Mn-Cr and Fe-Ni chronometers.

Original languageEnglish
Pages (from-to)82-86
Number of pages5
JournalChemical Geology
Volume274
Issue number1-2
DOIs
Publication statusPublished - Jun 2010

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standardization
Isotopes
Standardization
Dilution
dilution
isotope
Silicates
chondrite
Chronometers
silicate
basalt
peridotite
method
matrix

Keywords

  • Cr, Mn, Fe, Co, and Ni determination
  • High resolution MC-ICP-MS
  • Internal standardization
  • Isotope dilution

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geology

Cite this

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title = "Precise determination of Cr, Mn, Fe, Co and Ni concentration by an isotope dilution-internal standardization method employing high resolution MC-ICP-MS",
abstract = "A new determination method for Cr, Mn, Fe, Co and Ni in silicate samples by an isotope dilution-internal standardization method (ID-IS)-high resolution (HR)-MC-ICP-MS has been developed. A silicate sample is dissolved into solution, and a Cr-spike solution is added into an aliquot of the sample solution. Then the solution is introduced into HR-MC-ICP-MS without chemical separation. Concentration of Cr is determined by ID, and those of Mn, Fe, Co and Ni are by ID-IS. Matrix effects were examined in detail, and negligible down to a dilution factor (DF; the weight of the sample solution over that of the sample in the solution) of ~3000 for basalt, and ~104 for peridotite and chondrite within an error range of ±1{\%}. ID-IS-HR-MC-ICP-MS showed intermediate precision of ~1{\%} for basalt and chondrite, which is comparable to ID-TIMS for Cr, Fe and Ni, and >10 times better than HR-ICP-MS, suggesting that this method is suitable for precise Mn-Cr and Fe-Ni chronometers.",
keywords = "Cr, Mn, Fe, Co, and Ni determination, High resolution MC-ICP-MS, Internal standardization, Isotope dilution",
author = "Akio Makishima and Akane Yamakawa and Katsuyuki Yamashita and Eizou Nakamura",
year = "2010",
month = "6",
doi = "10.1016/j.chemgeo.2010.03.018",
language = "English",
volume = "274",
pages = "82--86",
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T1 - Precise determination of Cr, Mn, Fe, Co and Ni concentration by an isotope dilution-internal standardization method employing high resolution MC-ICP-MS

AU - Makishima, Akio

AU - Yamakawa, Akane

AU - Yamashita, Katsuyuki

AU - Nakamura, Eizou

PY - 2010/6

Y1 - 2010/6

N2 - A new determination method for Cr, Mn, Fe, Co and Ni in silicate samples by an isotope dilution-internal standardization method (ID-IS)-high resolution (HR)-MC-ICP-MS has been developed. A silicate sample is dissolved into solution, and a Cr-spike solution is added into an aliquot of the sample solution. Then the solution is introduced into HR-MC-ICP-MS without chemical separation. Concentration of Cr is determined by ID, and those of Mn, Fe, Co and Ni are by ID-IS. Matrix effects were examined in detail, and negligible down to a dilution factor (DF; the weight of the sample solution over that of the sample in the solution) of ~3000 for basalt, and ~104 for peridotite and chondrite within an error range of ±1%. ID-IS-HR-MC-ICP-MS showed intermediate precision of ~1% for basalt and chondrite, which is comparable to ID-TIMS for Cr, Fe and Ni, and >10 times better than HR-ICP-MS, suggesting that this method is suitable for precise Mn-Cr and Fe-Ni chronometers.

AB - A new determination method for Cr, Mn, Fe, Co and Ni in silicate samples by an isotope dilution-internal standardization method (ID-IS)-high resolution (HR)-MC-ICP-MS has been developed. A silicate sample is dissolved into solution, and a Cr-spike solution is added into an aliquot of the sample solution. Then the solution is introduced into HR-MC-ICP-MS without chemical separation. Concentration of Cr is determined by ID, and those of Mn, Fe, Co and Ni are by ID-IS. Matrix effects were examined in detail, and negligible down to a dilution factor (DF; the weight of the sample solution over that of the sample in the solution) of ~3000 for basalt, and ~104 for peridotite and chondrite within an error range of ±1%. ID-IS-HR-MC-ICP-MS showed intermediate precision of ~1% for basalt and chondrite, which is comparable to ID-TIMS for Cr, Fe and Ni, and >10 times better than HR-ICP-MS, suggesting that this method is suitable for precise Mn-Cr and Fe-Ni chronometers.

KW - Cr, Mn, Fe, Co, and Ni determination

KW - High resolution MC-ICP-MS

KW - Internal standardization

KW - Isotope dilution

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