けい光X線による浮遊じんあい中の亜鉛および鉛の分析

概要

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Non-destructive determination of zinc and lead in suspended particulates was investigated by using "filter paper method" and "briquet method". The samples collected on the filter paper by using a high volume air sampler were determined non-destructively and rapidly by the filter paper method. The samples collected by an electric precipitator were diluted with boric acid and then determined by the briquet method. To prepare the standard samples, ZnO, PbO2 or Pb(NO3)2 were diluted to a given concentration with kaolin which was regarded as a typical constituent of suspended particulates. Fe2O3 and CaSO4·2H2O were added to the standard samples for checking up the matrix effect. The calibration curves were obtained by using scattered X-rays from W-tube as an internal standard to correct matrix' effect. The quantitative ranges were above 1 μg for Pb by the filter paper method and above 0.5 μg/g for Zn and 5 μg/g for Pb by the briquet method, respectively. Analytical results of Zn and Pb in suspended particulates by this procedure agreed with those by atomic absorption method.
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