Determination of Trace Fluoride Ion in Contaminated Water by 14 MeV Neutron Activation Analysis
1973 Volume 22 Issue 2 Pages 59-64
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1973 Volume 22 Issue 2 Pages 59-64
The determination of trace fluorine in contaminated water has been investigated by combining a concentration technique with the fast neutron activation analysis utiliz-ing the reaction of 19F (n, 2n) 18F.
An amount of 1% AgNO3 solution was added to one liter of sample water to remove Cl- as AgCl. The filtrate was dropped through a column of 5 ml Dowex-2X anion exchange resin of acetate type. The resin was washed, dried and packed in a polyethylene capsule of 3 ml capacity. Three samples prepared in this way and one monitoring sample (CaF2) were simultaneously irradiated by a neutron beam with the flux of 5×109-1×1010n/sec for 20 min. They were cooled for 100 min and the radioactivity of 0.511 Me V γ-photo peak from each sample was successively counted for 10 min.
Fluoride ion at the level of 1 ppm was found to be determined without any interferences due to coexistent ions in water sample by the present analytical procedure.
