Automated radioanalytical determination of lead and beryllium

The automated modification of the radioanalyitical determination of lead and beryllium using Auto Analyzer modules has been developed. The method for lead determination is based on a two-phase isotope exchange of lead between the sample solution labelled with 212Pb and the standard lead diethyldithiocarbamate solution in carbon tetrachloride. For the determination of beryllium a substoichiometric isotope dilution method using 7Be as tracer and acetylacetone in chloroform as extractant was used. As little as 0.02 μg/cm3 of lead and 2 μg/cm3 of beryllium can be determined by the methods above. The flow diagrams of the automated procedures are presented. (author)