土壌中における微量元素の放射化分析

概要

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Radioactivation analysis is very useful for the determination of micronutrient elements in soil. The details of the methods are described for Ni, Cu, Zn, Mo and Co in soil. Soil samples and standard samples, which contained known amounts of the elements, were activated simultaneously for 14 hours in the pile (1.5×1012 neutrons per sq. cm per second) and sys tematie radiochemical separation of the individual elements were followed using carriers. Finally, these elements were precipitated as Ni-dimethylglyoxime, Cu-thiocyanate, Zn-quinaldate, Mo-hydroxyquinolate and potassium cobaltinitrite. Radiochemical purity of each compound was confirmed by plotting decay curve and gamma spectrometry. The radioactivities due to these elements from the soil samples and standard samples were compared after correction for chemical yields, self-absorption, radioactive decay and paralysis time. The quantities of these elements were calculated by beta counts and gamma counts, respectively. The results for the soils treated or nontreated the farmyard manure for many years showed that the farmyard manure had small increasing effects on the contents of the micronutrient elements in soil.
社団法人日本アイソトープ協会の論文