1998
DOI: 10.1007/bf02389762
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Neptunium determination by inductively coupled plasma mass spectrometry (ICP-MS)

Abstract: The determination of neptunium-237 (237Np) traditionally has been performed by alpha spectrometry or neutron activation analysis. These methods are labor intensive and require several days for completion. Inductively Coupled Plasma Mass Spectrometry (ICP-MS) is a possible alternative for 237Np determinations. This paper describes the analytical method developed for samples that have significant levels of uranium present. The lower reporting limits achievable by ICP-MS are competitive with the counting methods,… Show more

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Cited by 16 publications
(10 citation statements)
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“…Neptunium-237 is produced in significant quantities in nuclear reactors by the decay of the 237 U that results from the (n,2n) reaction on 238 U. 1 In nature it occurs in minute quantities in uranium minerals and as a consequence of fallout from nuclear weapons testing and from reprocessing of nuclear fuels. Even though contributing to a small part of the total a activity measured in environmental samples, 237 Np activity will continue to increase with time in the environment due to its production by decay of its parent 241 Am (T 1/2 ~433 years) and grandparent 241 Pu (T 1/2 ~14.4 years).…”
Section: Introductionmentioning
confidence: 99%
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“…Neptunium-237 is produced in significant quantities in nuclear reactors by the decay of the 237 U that results from the (n,2n) reaction on 238 U. 1 In nature it occurs in minute quantities in uranium minerals and as a consequence of fallout from nuclear weapons testing and from reprocessing of nuclear fuels. Even though contributing to a small part of the total a activity measured in environmental samples, 237 Np activity will continue to increase with time in the environment due to its production by decay of its parent 241 Am (T 1/2 ~433 years) and grandparent 241 Pu (T 1/2 ~14.4 years).…”
Section: Introductionmentioning
confidence: 99%
“…3 Due to the long half-life and its mobility in the environment, 237 Np will be one of the most hazardous elements in high-level nuclear waste when in geological repositories for at least 10 4 to 3 6 10 7 years after disposal. 4 The main methods employed for the determination of 237 Np are a-spectrometry, [5][6][7] inductively-coupled mass spectrometry (ICP-MS), 1,[8][9][10][11][12][13] neutron activation analysis (NAA) 14,15 and a liquid scintillation with rejection of b-c emitters. 16 The major drawback in 237 Np measurement by a-spectrometry is the need of extensive sample preparation prior to counting, in particular to remove 234 U, which has a similar a decay energy.…”
Section: Introductionmentioning
confidence: 99%
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“…NAA suffers of potential interferences, requires up to several days to complete preparation and the numbers of the facilities available are limited. 14 PERALS is a relatively new method that combines chemical separation by liquid-liquid extraction and measurement of the alpha-activity in water-immiscible scintillators. This technique reduces the beta-gamma background by 99.9% and lowers the limit of detection by one order of magnitude in comparison to classical alpha-spectrometry.…”
Section: Introductionmentioning
confidence: 99%