静岡大学MAT-250 質量分析計によるドロマイト試料の測定法

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  • Dolomite sample measurements using MAT-250 mass-spectrometer at Shizuoka University
  • シズオカ ダイガク MAT 250 シツリョウ ブンセキケイ ニ ヨル ドロマイト シリョウ ノ ソクテイホウ

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In this paper, we report the procedure for carbon and oxygen isotopic measurement of small amount of dolomite powder using IR-MS system, MAT-250 at Shizuoka University. Although the dolomite samples had been measured using a batch method, we tried to prepare the carbon dioxide gas of dolomite sample using the existing online carbonate (calcite) sample preparation system. The examined analytical conditions are (1) set reaction vessel temperature 100°C and (2) set reaction time more than 60 minutes. In addition, we describe the operation manual for precise measurement of small amount of carbon dioxide, derived from carbonate minerals reacted with conc. phosphoric acid or carbon dioxide prepared offline and stored in a glass tube. We hope that this paper helps the users to understand of the usage of the mass-spectrometer.

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