Determination of 99Tc in environmental samples and depleted uranium penetrators using ICP-MS

Sahli, Hans; Röllin, Stefan; Corcho-Alvarado, J.A.

doi:10.1007/s10967-016-5145-2

Cited by 4 publications

(3 citation statements)

References 35 publications

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“…Pu radionuclides were eluted in 20 mL as described elsewhere. [13] A known amount of an In standard solution was added to the Pu fraction for the MC-ICP-MS measurement.…”

Section: Resultsmentioning

confidence: 99%

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Determination of Plutonium and Uranium Radionuclides in Glacier Ice Samples by MC-ICP-MS

Röllin

Sahli

Gnägi

et al. 2020

Chimia

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A radiochemical procedure for the determination of plutonium (Pu) and uranium (U) radionuclides in ice samples by multicollector inductively coupled plasma mass spectrometer (MC-ICP-MS) is presented. Pu and U radionuclides are preconcentrated by coprecipitation and then separated by extraction chromatography. The purified Pu and U fractions are analyzed by MC-ICP-MS. Detection limits of 2 × 10 –3 and 3 × 10–6 mBq kg–1 were achieved for 239Pu and 236U, respectively. Surface ice samples collected from the Gauli glacier (Switzerland) were analyzed by this method. The surface of the Gauli Glacier retains historical records of 239Pu, 240Pu and 236U from the nuclear weapon testing (NWT) period. Pu and U radionuclides were found to be consistent in terms of pattern, showing two peaks possibly related to the two main periods of the NWTs (1954–1958 and 1961–1963). 3H measurements, also released by the NWT, further confirmed the Pu and U results. The 240Pu/239Pu ratio ranged from 0.14 to 0.25, and 236U/ 239Pu ranged from 0.14 to 0.81. The Pu atom ratios ranged within the limits of global fallout in the most intensive period of NWT (1952 to 1962).

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“…Pu radionuclides were eluted in 20 mL as described elsewhere. [13] A known amount of an In standard solution was added to the Pu fraction for the MC-ICP-MS measurement.…”

Section: Resultsmentioning

confidence: 99%

“…The UTEVA resin was used to separate and purify the U radioisotopes. [13] After conditioning the TEVA resin, the sample (breakthrough from the TEVA resin) was loaded onto the UTEVA resin. The column was rinsed with 10 mL HCl 6 M and then with 10 mL HNO 3 3 M. U radioisotopes were eluted with 20 mL of a 0.2% HNO 3 /0.002% HF solution.…”

Section: Resultsmentioning

confidence: 99%

Determination of Plutonium and Uranium Radionuclides in Glacier Ice Samples by MC-ICP-MS

Röllin

Sahli

Gnägi

et al. 2020

Chimia

Self Cite

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“…Although the generation of isobars is possible through polyatomic ions (e.g., 40 Ca 18 OH 40 Ar, 43 Ca 16 O 40 Ar, 51 V 16 O 3 , 59 Co 40 Ar, 62 Ni 37 Cl, 63 Cu 36 Ar, 64 Zn 35 Cl, 87 Rb 12 C, and 87 Sr 12 C), 16,17 the primary isobaric and polyatomic interferences are often found around m/z 99 due to 98 Mo 1 H and 99 Ru. The occurrence rates of these interferences have been reported as the 98 MoH/Mo ratio is on the order of 10 −5 − 10 −6 for ICP−single quadrupole MS (ICP−QMS) 18 and ICP− sector field MS (ICP−SFMS), 19 arising from the 12.76% of natural Ru that occurs as 99 Ru. Other typical major interferences are caused by mass-spectral overlapping problems arising from peak tailing of excess amounts of 98 Mo.…”

Section: ■ Introductionmentioning

confidence: 99%

Online Solid-Phase Extraction–Inductively Coupled Plasma–Quadrupole Mass Spectrometry with Oxygen Dynamic Reaction for Quantification of Technetium-99

et al. 2021

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Quantification of pg/L levels (i.e., 0.6 mBq/L) of radioactive technetium-99 (99Tc) was achieved within 15 min in the presence of isobaric and polyatomic interference sources such as ruthenium-99 (99Ru) and molybdenum hydride (98Mo1H) at 3–11 orders of magnitude higher concentrations. Online solid-phase extraction–inductively coupled plasma–quadrupole mass spectrometry (ICP–QMS) with oxygen (O2) dynamic reaction cell (online SPE–ICP–MS–DRC) was shown to be a thorough automatic analytical system, circumventing the need for human handling. At three stepwise separations (SPE–DRC–Q mass filters), we showed that interference materials allowed the coexistence of abundance ratios of 1.5 × 10–13 and 1.1 × 10–5 for 99Tc/Mo and 99Tc/Ru, respectively. A classical mathematical correction using the natural isotope ratio of 99Ru/102Ru was used to calculate the residues of 99Ru. Using this optimized system, a detection limit (DL; 3σ) of 99Tc was 9.3 pg/L (= 5.9 mBq/L) for a 50 mL injection and sequential measurements were undertaken at a cycle of 24 min/sample. For the measurement of a lower concentration of 99Tc, an AG1-X8 anion-exchange column was used to study 20 L of seawater. Its DL was approximately 1000 times greater than that of previous methods (70.0 fg/L). Thus, this method withstands coexistences of 5.8 × 10–18 and 3.5 × 10–9 for 99Tc/Mo and 99Tc/Ru, respectively. Spike and recovery tests were conducted for environmental samples; the resulting values showed good agreement with the spike applied.

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Capillary electrophoresis as sample introduction system for highly sensitive and interference-free determination of 99Tc by ICP-MS

Zhou,

Bao,

Long

et al. 2024

Chinese Chemical Letters

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Determination of 99Tc in environmental samples and depleted uranium penetrators using ICP-MS

Cited by 4 publications

References 35 publications

Determination of Plutonium and Uranium Radionuclides in Glacier Ice Samples by MC-ICP-MS

Determination of Plutonium and Uranium Radionuclides in Glacier Ice Samples by MC-ICP-MS

Online Solid-Phase Extraction–Inductively Coupled Plasma–Quadrupole Mass Spectrometry with Oxygen Dynamic Reaction for Quantification of Technetium-99

Capillary electrophoresis as sample introduction system for highly sensitive and interference-free determination of 99Tc by ICP-MS

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