Journal
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
Volume 318, Issue 3, Pages 2039-2047Publisher
SPRINGER
DOI: 10.1007/s10967-018-6194-5
Keywords
Cloud point extraction; Neutron activation; Vanadium; Seaweeds
Funding
- International Atomic Energy Agency (IAEA)
- Natural Sciences and Engineering Research Council of Canada
- cooperation of the Dalhousie University SLOWPOKE-2 Reactor (DUSR) facility
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A simple one-step micelle-mediated extraction, commonly called cloud point extraction, method was developed for the preconcentration of vanadium in red, brown and green seaweeds. The recovery of vanadium under the optimized conditions of pH 3.7, [PAN/TAN]=1x10(-4) M, [PONPE-20]=0.1% (m/v), ionic strength=0.05M KNO3, and a temperature of 41 degrees C was>99%. Vanadium was assayed by neutron activation analysis using the Dalhousie University SLOWPOKE-2 reactor facility. The detection limits for vanadium varied from 0.6 to 3.9 mu gkg(-1) depending on the sample. The method was validated using certified reference materials. Mass fractions of vanadium in seaweeds ranged from 0.009 to 55.4mgkg(-1).
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