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


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.


Nitrate Aqueous Solution Detection Limit Calcination Environmental Sample 
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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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