Abstract
A simple destructive neutron activation method for the determination of Hg and Se has been developed. The irradiated, sample is heated in a stream of oxygen at 1000°C, in a quartz tube in which two charcoal traps are positioned. The evaporated Hg, Se and contaminants such as Br are collected in the first charcoal trap. Only Hg is removed to the second trap by heating the first one at 750°C in a stream of nitrogen. The charcoal traps are them measured with a Ge(Li) detector. The analytical results obtained by this method for Hg and Se in several biological standard reference materials showed good agreement with the certified values.
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