固相抽出ICP-MSによる摩周湖水中の微量鉛の定量及び同位体比測定

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タイトル別名
  • Determination of the Concentration and Isotope Ratio of Trace Lead in Lake Mashu by Solid-phase Extraction/ICP-MS
  • コソウ チュウシュツ ICP-MS ニ ヨル マシュウ コスイ チュウ ノ ビリョウ ナマリ ノ テイリョウ オヨビ ドウイタイヒ ソクテイ

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<p>Lake Mashu is the only lake that serves as a baseline station of the United Nations Global Environment Monitoring System/Water (GEMS/Water) Programme. In this study, the concentration of trace lead in lake-water samples was determined by solid-phase extraction/concentration-ICP-MS to clarify the depth vertical profiles of lead. The finding that the lead concentration in the lake water above the thermocline shows a higher value than that in the lake water below the thermocline means that the input of lead into the surface water occurs during the thermocline-stratification period. The isotopic ratios (208Pb/206Pb and 207Pb/206Pb) were measured to estimate the origin of the lead. The obtained lead isotopic ratios in the surface water samples are similar to the reported values of the lead emitted in Japan rather than those at the Eurasia continent. The quantitative and isotopic analytical results in this study suggest a potential input of anthropogenically derived lead, presumably originating in Japan, into the surface water of Lake Mashu via the atmosphere since there is no inflowing river to the lake.</p>

収録刊行物

  • 分析化学

    分析化学 68 (11), 877-883, 2019-11-05

    公益社団法人 日本分析化学会

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