PRECONCENTRATION OF STRONTIUM USING APHRONS

Aphrons containing di-(2-ethylhexyl)phosphoric acid (DEPHA) as an acti ve substance were used for preconcentration of strontium from acetate buffers. Conditions for preparation of reasonably stable aphrons using non-ionic and anionic detergents in n-alkane and water mixture were f ound. After distribution of strontium, aphrons were separated from wat er solution by filtration with micro-filters. The separation efficienc y was compared to the results obtained in liquid-liquid extraction of strontium with DEPHA in n-alkane. The results show that the preconcent ration efficiency for strontium for aphrons is as good as for liquid-l iquid extraction systems.