Risk assessment of foods in contaminated areas of Asia and development of an In -Air PIXE system.

分析了在孟加拉国和蒙古受污染地区收集的各种食品，包括农产品、鱼类和乳制品。因此，就有可能评估污染的实际情况，推测接触途径，并估计人们在考虑其饮食习惯的情况下对有毒元素的总摄入量。建立了一个由两个硅（锂）探测器、真空帽和x射线吸收器组成的双探测器测量系统，并建立了定量分析方法。此外，还发展了对活植物进行定量分析的新方法，使观察某些有毒元素在活植物中的运动成为可能。

Various foods including farm products, fishes and dairy products collected in the contaminated areas in Bangladesh and Mongolia have been analyzed. As a result, it becomes possible to evaluate the actual condition of contamination, to presume the pathways of exposure and to estimate total intakes of toxic elements for the people considering their eating habits. Also, a two-detector measurement system, consisting of two Si(Li) detectors with a vacuum cap and an X-ray absorbers, has been established in in-air PIXE system, and the method of quantitative analysis has been developed. Furthermore, the new method of quantitative analysis of living plants has been developed, and it became possible to observe movement of certain toxic elements in living plants.