PRECONCENTRATION OF NEPTUNIUM BY SUPPORTED LIQUID MEMBRANES FOR LUMINESCENT ANALYSIS OF ENVIRONMENTAL-SAMPLES

Authors
IVANOVA SA MIKHEEVA MN NOVIKOV AP MYASOEDOV BF
Citation
Sa. Ivanova et al., PRECONCENTRATION OF NEPTUNIUM BY SUPPORTED LIQUID MEMBRANES FOR LUMINESCENT ANALYSIS OF ENVIRONMENTAL-SAMPLES, Journal of radioanalytical and nuclear chemistry, 186(4), 1994, pp. 341-352
Citations number
14
Categorie Soggetti
Chemistry Inorganic & Nuclear","Chemistry Analytical","Nuclear Sciences & Tecnology
Journal title
Journal of radioanalytical and nuclear chemistry → ACNP
ISSN journal
02365731
Volume
186
Issue
4
Year of publication
1994
Pages
341 - 352
Database
ISI
SICI code
0236-5731(1994)186:4<341:PONBSL>2.0.ZU;2-D
Abstract
The possibilities of liquid membrane preconcentration of neptunium fro m environmental samples of different nature have been studied. The use the solid-supported liquid membrane containing a trioctyl-methylammon ium nitrate carrier allows to achieve preconcentration factors of 10(2 )-5x10(2). The teflon solid support does not interact with the lumines cent matrix (CaF2, PbMoO4) during calcination at 900-degrees-C, so it makes practical to measure the neptunium content by luminescence witho ut reextraction to aqueous solution. As a result, the detection limit of neptunium is lowed down to 10(-13) g ml-1 and 5x10(-13) g g-1 for p ure solutions and soils, respectively.