プラズマ溶融処理した非金属廃棄物のマイクロ波加熱装置を用いる迅速溶解法

概要

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A relatively large quantity of sample solutions have to be prepared for the radiochemical analysis of solidified products yielded by a plasma melting treatment of non-metallic radioactive wastes. In order to dissolve a sample of solidified products rapidly, a dissolution method with microwave heating devices was applied. In a conventional method involving only external heating with various mixtures of acids (HNO_3, HF, HClO_4 and H_2SO_4), a 0.1g amount of the sample was dissolved with difficulty. However, upon applying the microwave-assisted dissolution method, a 1g amount of the sample was completely dissolved in a shorter time. Thereby the time for dissolution procedures was shortened to less than one-tenth. The present dissolution method was successfully applied to blast furnace slag as a reference material to determine the main elements with good precision.
2006-01-05