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Determination of 129I/127I isotope ratios in liquid solutions and environmental soil samples by ICP-MS with hexapole collision cell

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Abstract
The determination of I-129 in environmental samples at ultratrace levels is very difficult by ICP-MS due to a high noise caused by Xe impurities in argon plasma gas (interference of Xe-129(+)), possible (IH2+)-I-127 interference and an insufficient abundance ratio sensitivity of the ICP mass spectrometer for I-129/I-127 isotope ratio measurement. A sensitive, powerful and fast analytical technique for iodine isotope ratio measurements in aqueous solutions and contaminated soil samples directly without sample preparation using ICP-MS with a hexapole collision cell (ICP-CC-QMS) was developed. Oxygen is used as reaction and carrier gas for iodine thermal desorption via the gas phase from solid environmental material in the sample introduction device coupled on-line to ICP-CC-QMS. A mixture of oxygen and helium as reaction gases in the hexapole collision cell was applied for reducing disturbing background intensity of Xe-129(+). After optimization of measurement procedures the detection limit for I-129(+) in aqueous solution was 8x10(-13) g ml(-1), which is better by about two orders of magnitude in comparison to the detection limit for I-129(+) in sector field ICP-MS. The detection limit for direct I-129(+) determination in contaminated environmental (soil) samples via gas-phase desorption without any additional sample preparation was 3x10(-11) g g(-1) (30 ppt). Furthermore, the results of the determination of I-129/I-127 isotope ratios at the 10(-5)-10(-6) level in synthetic laboratory standards and environmental soil samples from contaminated areas are given.

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MLA
Izmer, Andrei, et al. “Determination of 129I/127I Isotope Ratios in Liquid Solutions and Environmental Soil Samples by ICP-MS with Hexapole Collision Cell.” JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY, vol. 18, no. 11, 2003, pp. 1339–45, doi:10.1039/b306446h.
APA
Izmer, A., Boulyga, S., & Becker, J. S. (2003). Determination of 129I/127I isotope ratios in liquid solutions and environmental soil samples by ICP-MS with hexapole collision cell. JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY, 18(11), 1339–1345. https://doi.org/10.1039/b306446h
Chicago author-date
Izmer, Andrei, Sergei Boulyga, and J. Sabine Becker. 2003. “Determination of 129I/127I Isotope Ratios in Liquid Solutions and Environmental Soil Samples by ICP-MS with Hexapole Collision Cell.” JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY 18 (11): 1339–45. https://doi.org/10.1039/b306446h.
Chicago author-date (all authors)
Izmer, Andrei, Sergei Boulyga, and J. Sabine Becker. 2003. “Determination of 129I/127I Isotope Ratios in Liquid Solutions and Environmental Soil Samples by ICP-MS with Hexapole Collision Cell.” JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY 18 (11): 1339–1345. doi:10.1039/b306446h.
Vancouver
1.
Izmer A, Boulyga S, Becker JS. Determination of 129I/127I isotope ratios in liquid solutions and environmental soil samples by ICP-MS with hexapole collision cell. JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY. 2003;18(11):1339–45.
IEEE
[1]
A. Izmer, S. Boulyga, and J. S. Becker, “Determination of 129I/127I isotope ratios in liquid solutions and environmental soil samples by ICP-MS with hexapole collision cell,” JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY, vol. 18, no. 11, pp. 1339–1345, 2003.
@article{733619,
  abstract     = {{The determination of I-129 in environmental samples at ultratrace levels is very difficult by ICP-MS due to a high noise caused by Xe impurities in argon plasma gas (interference of Xe-129(+)), possible (IH2+)-I-127 interference and an insufficient abundance ratio sensitivity of the ICP mass spectrometer for I-129/I-127 isotope ratio measurement. A sensitive, powerful and fast analytical technique for iodine isotope ratio measurements in aqueous solutions and contaminated soil samples directly without sample preparation using ICP-MS with a hexapole collision cell (ICP-CC-QMS) was developed. Oxygen is used as reaction and carrier gas for iodine thermal desorption via the gas phase from solid environmental material in the sample introduction device coupled on-line to ICP-CC-QMS. A mixture of oxygen and helium as reaction gases in the hexapole collision cell was applied for reducing disturbing background intensity of Xe-129(+). After optimization of measurement procedures the detection limit for I-129(+) in aqueous solution was 8x10(-13) g ml(-1), which is better by about two orders of magnitude in comparison to the detection limit for I-129(+) in sector field ICP-MS. The detection limit for direct I-129(+) determination in contaminated environmental (soil) samples via gas-phase desorption without any additional sample preparation was 3x10(-11) g g(-1) (30 ppt). Furthermore, the results of the determination of I-129/I-127 isotope ratios at the 10(-5)-10(-6) level in synthetic laboratory standards and environmental soil samples from contaminated areas are given.}},
  author       = {{Izmer, Andrei and Boulyga, Sergei and Becker, J. Sabine}},
  issn         = {{0267-9477}},
  journal      = {{JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY}},
  language     = {{eng}},
  number       = {{11}},
  pages        = {{1339--1345}},
  title        = {{Determination of 129I/127I isotope ratios in liquid solutions and environmental soil samples by ICP-MS with hexapole collision cell}},
  url          = {{http://doi.org/10.1039/b306446h}},
  volume       = {{18}},
  year         = {{2003}},
}

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