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Improvement of Measurement Precisions for Uranium Isotopes at Ultra Trace Levels by Modification of the Sample Introduction System in MC-ICP-MS
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  • Journal title : Mass Spectrometry Letters
  • Volume 7, Issue 2,  2016, pp.50-54
  • Publisher : Korean Society Mass Spectrometry
  • DOI : 10.5478/MSL.2016.7.2.50
 Title & Authors
Improvement of Measurement Precisions for Uranium Isotopes at Ultra Trace Levels by Modification of the Sample Introduction System in MC-ICP-MS
Park, Ranhee; Lim, Sang Ho; Han, Sun-Ho; Lee, Min Young; Park, Jinkyu; Lee, Chi-Gyu; Song, Kyuseok;
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 Abstract
Multi-collector inductively coupled plasma mass spectrometry (MC-ICP-MS) is currently used in our laboratory for isotopic and quantitative analyses of nuclear materials at ultra-trace levels in environmental swipe samples, which is a very useful for monitoring undeclared nuclear activities. In this study, to improve measurement precisions of uranium isotopes at ultratrace levels, we adopted a desolvating nebulizer system (Aridus-II, CETAC., USA), which can improve signal sensitivity and reduce formation of uranium hydride. A peristaltic pump was combined with Aridus-II in the sample introduction system of MC-ICP-MS to reduce long-term signal fluctuations by maintaining a constant flow rate of the sample solution. The signal sensitivity in the presence of Aridus-II was improved more than 10-fold and the formation ratio of UH/U decreased by 16- to 17- fold compared to a normal spray chamber. Long-term signal fluctuations were significantly reduced by using the peristaltic pump. Detailed optimizations and evaluations with uranium standards are also discussed in this paper.
 Keywords
MC-ICP-MS;desolvating nebulizer system;peristaltic pump;measurement precision;signal sensitivity;hydride formation;
 Language
English
 Cited by
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