Precise isotopic determination of Hf and Pb at sub-nano gram levels by MC-ICP-MS employing a newly designed sample cone and a pre-amplifier with a 1012 ohm register

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Abstract

Precise isotopic determination methods for Hf and Pb at sub-nano gram levels have been undertaken for this contribution utilizing the Neptune multiple collector ICP-MS (MC-ICP-MS) with a newly designed sample cone (the Jet cone) and a new pre-amplifier with a highly-resistive register of 1012 ohm. The Jet cone enhanced sensitivities 1.6 and 3 times for Hf and Pb, respectively. The Jet cone showed no significant improvements in reproducibility of Hf isotope analysis at >1 ng compared to the normal cone, but the reproducibility improved considerably by half when Hf concentration of 207Pb/206Pb, 206Pb/204Pb, 207Pb/204Pb and 208Pb/204Pb were 0.026, 0.28, 0.33 and 0.36% using total Pb of 0.025 ng, and 0.02, 0.10, 0.10 and 0.08% using 0.05 ng, respectively. Thus, the Jet cone with the new pre-amplifier showed the best performance compared to the normal cone and pre-amplifier and are similar or even better than those obtained by the 202Pb-205Pb double-spike TIMS or multi-ion counting ICP-MS techniques.

Original languageEnglish
Pages (from-to)1712-1716
Number of pages5
JournalJournal of Analytical Atomic Spectrometry
Volume25
Issue number11
DOIs
Publication statusPublished - Nov 2010

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  • Analytical Chemistry
  • Spectroscopy

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title = "Precise isotopic determination of Hf and Pb at sub-nano gram levels by MC-ICP-MS employing a newly designed sample cone and a pre-amplifier with a 1012 ohm register",
abstract = "Precise isotopic determination methods for Hf and Pb at sub-nano gram levels have been undertaken for this contribution utilizing the Neptune multiple collector ICP-MS (MC-ICP-MS) with a newly designed sample cone (the Jet cone) and a new pre-amplifier with a highly-resistive register of 1012 ohm. The Jet cone enhanced sensitivities 1.6 and 3 times for Hf and Pb, respectively. The Jet cone showed no significant improvements in reproducibility of Hf isotope analysis at >1 ng compared to the normal cone, but the reproducibility improved considerably by half when Hf concentration of 207Pb/206Pb, 206Pb/204Pb, 207Pb/204Pb and 208Pb/204Pb were 0.026, 0.28, 0.33 and 0.36{\%} using total Pb of 0.025 ng, and 0.02, 0.10, 0.10 and 0.08{\%} using 0.05 ng, respectively. Thus, the Jet cone with the new pre-amplifier showed the best performance compared to the normal cone and pre-amplifier and are similar or even better than those obtained by the 202Pb-205Pb double-spike TIMS or multi-ion counting ICP-MS techniques.",
author = "Akio Makishima and Eizou Nakamura",
year = "2010",
month = "11",
doi = "10.1039/c0ja00015a",
language = "English",
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pages = "1712--1716",
journal = "Journal of Analytical Atomic Spectrometry",
issn = "0267-9477",
publisher = "Royal Society of Chemistry",
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AU - Makishima, Akio

AU - Nakamura, Eizou

PY - 2010/11

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N2 - Precise isotopic determination methods for Hf and Pb at sub-nano gram levels have been undertaken for this contribution utilizing the Neptune multiple collector ICP-MS (MC-ICP-MS) with a newly designed sample cone (the Jet cone) and a new pre-amplifier with a highly-resistive register of 1012 ohm. The Jet cone enhanced sensitivities 1.6 and 3 times for Hf and Pb, respectively. The Jet cone showed no significant improvements in reproducibility of Hf isotope analysis at >1 ng compared to the normal cone, but the reproducibility improved considerably by half when Hf concentration of 207Pb/206Pb, 206Pb/204Pb, 207Pb/204Pb and 208Pb/204Pb were 0.026, 0.28, 0.33 and 0.36% using total Pb of 0.025 ng, and 0.02, 0.10, 0.10 and 0.08% using 0.05 ng, respectively. Thus, the Jet cone with the new pre-amplifier showed the best performance compared to the normal cone and pre-amplifier and are similar or even better than those obtained by the 202Pb-205Pb double-spike TIMS or multi-ion counting ICP-MS techniques.

AB - Precise isotopic determination methods for Hf and Pb at sub-nano gram levels have been undertaken for this contribution utilizing the Neptune multiple collector ICP-MS (MC-ICP-MS) with a newly designed sample cone (the Jet cone) and a new pre-amplifier with a highly-resistive register of 1012 ohm. The Jet cone enhanced sensitivities 1.6 and 3 times for Hf and Pb, respectively. The Jet cone showed no significant improvements in reproducibility of Hf isotope analysis at >1 ng compared to the normal cone, but the reproducibility improved considerably by half when Hf concentration of 207Pb/206Pb, 206Pb/204Pb, 207Pb/204Pb and 208Pb/204Pb were 0.026, 0.28, 0.33 and 0.36% using total Pb of 0.025 ng, and 0.02, 0.10, 0.10 and 0.08% using 0.05 ng, respectively. Thus, the Jet cone with the new pre-amplifier showed the best performance compared to the normal cone and pre-amplifier and are similar or even better than those obtained by the 202Pb-205Pb double-spike TIMS or multi-ion counting ICP-MS techniques.

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