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- W2000589908 abstract "The determination of 129I 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 129Xe+), possible 127IH2+ interference and an insufficient abundance ratio sensitivity of the ICP mass spectrometer for 129I/127I 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 129Xe+. After optimization of measurement procedures the detection limit for 129I+ in aqueous solution was 8 × 10−13 g ml−1, which is better by about two orders of magnitude in comparison to the detection limit for 129I+ in sector field ICP-MS. The detection limit for direct 129I+ determination in contaminated environmental (soil) samples via gas-phase desorption without any additional sample preparation was 3 × 10−11 g g−1 (30 ppt). Furthermore, the results of the determination of 129I/127I isotope ratios at the 10−5–10−6 level in synthetic laboratory standards and environmental soil samples from contaminated areas are given." @default.
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- W2000589908 date "2003-01-01" @default.
- W2000589908 modified "2023-10-03" @default.
- W2000589908 title "Determination of 129I/127I isotope ratios in liquid solutions and environmental soil samples by ICP-MS with hexapole collision cell" @default.
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- W2000589908 doi "https://doi.org/10.1039/b306446h" @default.
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