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ベリリウム-10/アルミニウム-26測定用石英の抽出; 細胞分離装置セルハンドラーの適用

Separation of quartz for measurement of beryllium-10 and aluminium-26; Application of cell handler

國分 陽子   ; 内海 芳宣*; 伊藤 三郎*; 島田 耕史   

Kokubu, Yoko; Utsumi, Yoshinori*; Ito, Saburo*; Shimada, Koji

地表面の侵食速度等をベリリウム-10やアルミニウム-26で測定する場合、その測定試料として岩石や堆積物に含まれる石英を用いる。本報告では、その石英を抽出するために、フッ化水素酸を用いた化学処理を行わず、細胞分離装置であるセルハンドラーを用いた例を紹介する。セルハンドラーによる鉱物試料への光の当て方及びカメラの露光時間を最適化したところ、石英と長石などのそれ以外の鉱物を画像認識にて識別できることがわかった。また、この条件で岩石試料を用いた試験を試みたところ、装置内蔵の画像認識ソフトで石英を識別しピッキングを行う全自動による石英のみの抽出に成功した。

In the case of estimating erosion rates of ground surfaces from measurement of beryllium-10 and aluminum-26, quartz contained in rocks and sediments is used as a measurement sample. In this paper, we present an example of separating quartz using a cell handler, which is a cell separation system, without chemical treatment using hydrofluoric acid. By optimizing the way to apply light to the mineral sample with the cell handler and the exposure time of the camera of the cell handler, quartz and other minerals, such as feldspar, were able to be distinguished from other minerals, such as feldspar in image recognition. An experimental measurement using rock samples was then performed under these conditions. As a result, only quartz was successfully separated through a fully automatized process by that distinguishes and picks quartz using the image recognition software and picking system built into the cell handler.

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