P. Vanura et V. Jedinakovakrizova, DETERMINATION OF MICROAMOUNTS STRONTIUM BY SUBSTOICHIOMETRIC ISOTOPE-DILUTION ANALYSIS, Journal of radioanalytical and nuclear chemistry, 230(1-2), 1998, pp. 277-279
The isotope dilution with substoichiometric separation for the determi
nation of strontium has been investigated. Strontium can be extracted
with a substoichiometric amount of bis-1,2-dicarbollylcobaltate in nit
robenzene in the presence of 15-crown-5. It has been found, that Li+,
Mg2+, Ca2+ and Fe3+ do not interfere in the strontium determination bu
t the high extraction of K+, Na+ and NH4+ ions results in marked influ
ence.