Ar. Turker et al., DETERMINATION OF IRON AND LEAD BY FLAME ATOMIC-ABSORPTION SPECTROMETRY AFTER PRECONCENTRATION WITH SEPIOLITE, Fresenius' journal of analytical chemistry, 357(3), 1997, pp. 351-353
By using a new adsorbent (sepiolite) an adsorption-elution and atomic
absorption spectrometric method has been developed for the preconcentr
ation and determination of Fe and Pb. Recoveries of the analytes were
82 +/- 3% for Fe and 91 +/- 2% for Pb at 95% confidence level. For Cu
it was only 5 +/- 1%. The recovery of iron could be increased to about
97 +/- 1% by complexing with EDTA, the recovery of copper only to 57
+/- 2%. The optimised method was applied to the determination of lead
in metal materials (e.g. brass).