Abstract
Environmental samples (rice, soil, river soil and water, running water, pine needle, milk and grass) are collected from the area surrounding Kaya Memorial Takizawa Laboratory (radioisotope waste treatment laboratory) neighboring Nishina Memorial Cyclotron Center for detection of radionuclide in those. We examine annual variations of elemental concentrations in two kinds of environmental samples (pine needle and grass) collected during 5-years period. These were prepared using nitric acid ashing method and analyzed using ordinal vacuum PIXE for detection of the elemental concentration. The result indicates that the concentrations of potassium and phosphorous in grass change according as fertilizer. This is the primary study. The results of annual variations of elemental concentrations in other environmental samples will be described in another paper in the near future.
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