D. Sandhya et al., TRACE DETERMINATION OF ZINC BY SUBSTOICHIOMETRIC ISOTOPE-DILUTION ANALYSIS, Journal of AOAC International, 79(5), 1996, pp. 1205-1208
A radiometric method based on substoichiometric isotope dilution analy
sis using 1,10-phenanthroline and a substoichiometric amount of eosin
was developed for determining trace amounts of zinc. Evaluation of var
ious metal ion interferences showed that as little as 0.2 mu g Zn coul
d be determined in an aqueous-phase volume of 60 mL. The method has be
en successfully applied to the determination of Zn in city waste incin
eration ash, cadmium metal, Fourts-B tablets, Boro-plus ointment, and
magnesium alloy samples.