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Preconcentration of neptunium by supported liquid membranes for luminescent analysis of environmental samples

  • S. A. Ivanova
  • M. N. Mikheeva
  • A. P. Novikov
  • B. F. Myasoedov
Article

Abstract

The possibilities of liquid membrane preconcentration of neptunium from environmental samples of different nature have been studied. The use the solid-supported liquid membrane containing a trioctylmethylammonium nitrate carrier allows to achieve preconcentration factors of 102–5×102. The teflon solid support does not interact with the luminescent matrix (CaF2, PbMoO4) during calcination at 900 °C, so it makes practical to measure the neptunium content by luminescence without reextraction to aqueous solution. As a result, the detection limit of neptunium is lowed down to 10−13 g ml−1 and 5×10−13 g g−1 for pure solutions and soils, respectively.

Keywords

Nitrate Aqueous Solution Detection Limit Calcination Environmental Sample 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Akadémiai Kiadó 1994

Authors and Affiliations

  • S. A. Ivanova
    • 1
  • M. N. Mikheeva
    • 1
  • A. P. Novikov
    • 1
  • B. F. Myasoedov
    • 1
  1. 1.V. I. Vernadsky Institute of Geochemistry and Analytical ChemistryMoscowRussia

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