天然水中微量金属の多元素濃縮用キレート樹脂充填ミニカラムの開発(博士論文要録)
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概要
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Trace metals in natural water are sensitive indicators of geochemical processes and reactions, environmental pollutions, and bioactivities, though these elements are present in extremely low concentrations. Determination of trace metals in natural water is still a challenge for analysts, even using the most advanced available analytical instrument such as ICP-MS. In order to overcome this difficulty, a chelating resin-packed minicolumn was developed to preconcentrate trace metals in natural water. The minicolumn was constructed by packing a slurry of Chelex 100 resin into the space of the outlet of a syringe filter (DISMIC-25HP, ADVANTEC), which was then capped with another syringe filter (Millex-LH, Nihon Millipore Kogyo). Furthermore, a procedure for the preconcentration of trace metals in natural water using the present minicolumn was established by carefully optimizing each operating parameter. As a result, a concentration factor of 20-fold was achieved for trace metals using only 50 mL of a natural water sample, where the recovery values for most of the trace metals were more than 80% with a standard deviation less than 5%. The effectiveness of the present analytical method was assessed by determining trace metals in seawater certified reference materials (NASS-5, CASS-3, and CASS-4). Furthermore, determination of trace metals in seawater, river water, and mineral water samples was carried out to assess the environmental pollution of trace metals in natural water and the mineral nutriment in mineral water, respectively.
- 社団法人日本分析化学会の論文
- 2007-10-05