新潟大学積雪地域災害研究センターにおける炭酸塩試料の炭素・酸素同位体比測定

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  • ニイガタ ダイガク セキセツ チイキ サイガイ ケンキュウ センター ニ オケル タンサンエン シリョウ ノ タンソ サンソ ドウイタイヒ ソクテイ
  • Carbon and Oxygen isotopes determination for carbonate samples at Research Institute for Hazards in Snowy Area, Niigata University

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Measurements of carbon and oxygen isotope ratios for carbonate samples were started in earnest on a Micromass PRISM mass spectrometer in the Research Institute for Hazards in Snowy Areas, Niigata University. Carbonate samples were treated with 100% phosphoric acid at 190℃. The automatic front treatment device (MultiPrep) reduced the size of samples and cased the extraction and refining of CO_2 from carbonate samples. The δ^<13>C and δ^<18>O values of new laboratory standards are δ^<13>C_<VPDB>=4.76‰ andδ^<18>O_<VPDB>=-6.13‰ (FLD) and δ^<13>C_<VPDB>=-32.19‰ and δ^<18>O_<VPDB>=-22.44‰ (NCC), respectively. The new laboratory standards are effective in the correction of most unknown samples.

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