著者

杉山 裕子 Hatcher Patrick 熊谷 哲 Valentin Drucker Vladimir Fialkov 片野 俊也 三田村 緒佐武 中野 伸一 杉山 雅人

出版者

日本地球化学会

雑誌

日本地球化学会年会要旨集

巻号頁・発行日

vol.55, pp.190-190, 2008

---

バイカル湖深層水中の陸起源有機物の存在を分子レベルで明らかにすることを目的として、フーリエ変換イオンサイクロトロン共鳴型質量分析器による分析を行った。分析の結果、バイカル最深部945mの試料水で検出された質量ピークの89.6%は流入河川水中で検出されたピークと全く同じ分子式で示される物質であることが明らかになった。

著者

杉山 裕子 Hatcher Patrick G. 三田村 緒佐武 片野 俊也 熊谷 哲 中野 伸一 DRUCKER Valentin V. FIALKOV Vladimir A. 杉山 雅人

出版者

日本地球化学会

雑誌

地球化学 (ISSN:03864073)

巻号頁・発行日

vol.42, no.4, pp.165-177, 2008

被引用文献数

1

---

Lake Baikal, located on the north-eastern borders of Central Asia, is the deepest (maximum depth 1,700 m) and one of the largest lakes in the world. To elucidate the chemical composition of dissolved organic matter (DOM) in the Lake Baikal, we applied high resolution fourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS) to the lake water samples. Water samples were taken at the deepest point of Lake Baikal and its inflowing Barguzin River mouth on August 2005. The sample water was filtrated on board and DOM was extracted using C 18 solid-phase extraction disks (Kim et al., 2003^a). The extracted samples on the disks were analyzed by a 9.4-T FT-ICR mass spectrometer at the National High Magnetic Field Laboratory (Tallahassee, FL, USA) in negative ionization mode with a needle voltage of -2.0 kV. From the FT-ICR mass analysis, 3511, 2862 and 2191 peaks were detected (S/N>3) in river and 5 m- and 945 m- depth lake water samples, and more than 80% of the peaks were assigned within ± 1.0 ppm error. Using van Krevelen Diagrams (van Krevelen, 1950), we found that the main component of L. Baikal DOM was allochthonous lignin-like organic molecule, and that autochthonous lipid- and protein-like molecules were also found in surface water.