High precision determination of 228Ra and 228Ra/226Ra isotope ratio in natural waters by MC-ICPMS

Galit Sharabi; Boaz Lazar; Yehoshua Kolodny; Nataliya Teplyakov; Ludwik Halicz

doi:10.1016/j.ijms.2010.05.011

High precision determination of ²²⁸Ra and ²²⁸Ra/²²⁶Ra isotope ratio in natural waters by MC-ICPMS

Galit Sharabi^*, Boaz Lazar, Yehoshua Kolodny, Nataliya Teplyakov, Ludwik Halicz

^*Corresponding author for this work

Fredy & Nadine Herrmann Institute of Earth Sciences

Research output: Contribution to journal › Article › peer-review

22 Scopus citations

Abstract

A new methodology has been developed for precise and accurate determination of ²²⁸Ra and the radium isotope ratio (²²⁸Ra/²²⁶Ra) by multicollector inductively coupled plasma mass spectrometry (MC-ICPMS) in natural water. The method was tested on waters from Lake Kinneret (The Sea of Galilee) and saline springs that flow into it.The radium is pre-concentrated from 60L of Lake Kinneret water (or 2L of the saline springs water) by co-precipitation with MnO₂. The separation of radium from the matrix elements was conducted by BioRad^® AG50W-X8 and Sr Spec^® resins. The instrumental limit of detection for ²²⁶Ra and ²²⁸Ra was 5fgmL^-1 (0.05ppq) or 0.1 and 30dpmL^-1, respectively, and the absolute limit of detection 0.005fg. Internal precision of the radium isotope ratio (²²⁸Ra/²²⁶Ra) in Lake Kinneret for ²²⁸Ra concentration as low as 0.10fgL^-1 (0.06dpmL^-1) was 2.8% (2σ) and external precision was 10% (2σ, n=9).

Original language	English
Pages (from-to)	112-115
Number of pages	4
Journal	International Journal of Mass Spectrometry
Volume	294
Issue number	2-3
DOIs	https://doi.org/10.1016/j.ijms.2010.05.011
State	Published - Jul 2010

Keywords

MC-ICPMS
Ra
Ra
Radium isotopes
The Sea of Galilee

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title = "High precision determination of 228Ra and 228Ra/226Ra isotope ratio in natural waters by MC-ICPMS",

abstract = "A new methodology has been developed for precise and accurate determination of 228Ra and the radium isotope ratio (228Ra/226Ra) by multicollector inductively coupled plasma mass spectrometry (MC-ICPMS) in natural water. The method was tested on waters from Lake Kinneret (The Sea of Galilee) and saline springs that flow into it.The radium is pre-concentrated from 60L of Lake Kinneret water (or 2L of the saline springs water) by co-precipitation with MnO2. The separation of radium from the matrix elements was conducted by BioRad{\textregistered} AG50W-X8 and Sr Spec{\textregistered} resins. The instrumental limit of detection for 226Ra and 228Ra was 5fgmL-1 (0.05ppq) or 0.1 and 30dpmL-1, respectively, and the absolute limit of detection 0.005fg. Internal precision of the radium isotope ratio (228Ra/226Ra) in Lake Kinneret for 228Ra concentration as low as 0.10fgL-1 (0.06dpmL-1) was 2.8% (2σ) and external precision was 10% (2σ, n=9).",

keywords = "MC-ICPMS, Ra, Ra, Radium isotopes, The Sea of Galilee",

author = "Galit Sharabi and Boaz Lazar and Yehoshua Kolodny and Nataliya Teplyakov and Ludwik Halicz",

year = "2010",

month = jul,

doi = "10.1016/j.ijms.2010.05.011",

language = "אנגלית",

volume = "294",

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journal = "International Journal of Mass Spectrometry",

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AU - Sharabi, Galit

AU - Lazar, Boaz

AU - Kolodny, Yehoshua

AU - Teplyakov, Nataliya

AU - Halicz, Ludwik

PY - 2010/7

Y1 - 2010/7

N2 - A new methodology has been developed for precise and accurate determination of 228Ra and the radium isotope ratio (228Ra/226Ra) by multicollector inductively coupled plasma mass spectrometry (MC-ICPMS) in natural water. The method was tested on waters from Lake Kinneret (The Sea of Galilee) and saline springs that flow into it.The radium is pre-concentrated from 60L of Lake Kinneret water (or 2L of the saline springs water) by co-precipitation with MnO2. The separation of radium from the matrix elements was conducted by BioRad® AG50W-X8 and Sr Spec® resins. The instrumental limit of detection for 226Ra and 228Ra was 5fgmL-1 (0.05ppq) or 0.1 and 30dpmL-1, respectively, and the absolute limit of detection 0.005fg. Internal precision of the radium isotope ratio (228Ra/226Ra) in Lake Kinneret for 228Ra concentration as low as 0.10fgL-1 (0.06dpmL-1) was 2.8% (2σ) and external precision was 10% (2σ, n=9).

AB - A new methodology has been developed for precise and accurate determination of 228Ra and the radium isotope ratio (228Ra/226Ra) by multicollector inductively coupled plasma mass spectrometry (MC-ICPMS) in natural water. The method was tested on waters from Lake Kinneret (The Sea of Galilee) and saline springs that flow into it.The radium is pre-concentrated from 60L of Lake Kinneret water (or 2L of the saline springs water) by co-precipitation with MnO2. The separation of radium from the matrix elements was conducted by BioRad® AG50W-X8 and Sr Spec® resins. The instrumental limit of detection for 226Ra and 228Ra was 5fgmL-1 (0.05ppq) or 0.1 and 30dpmL-1, respectively, and the absolute limit of detection 0.005fg. Internal precision of the radium isotope ratio (228Ra/226Ra) in Lake Kinneret for 228Ra concentration as low as 0.10fgL-1 (0.06dpmL-1) was 2.8% (2σ) and external precision was 10% (2σ, n=9).

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High precision determination of ²²⁸Ra and ²²⁸Ra/²²⁶Ra isotope ratio in natural waters by MC-ICPMS

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