| Project/Area Number |
62430008
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| Research Category |
Grant-in-Aid for General Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Research Field |
分析・地球化学
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| Research Institution | TOHOKU UNIVERSITY |
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Principal Investigator |
SUZUKI Nobuo Tohoku University, Faculty of Science, Professor, 理学部, 教授 (10006025)
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| Co-Investigator(Kenkyū-buntansha) |
IMURA Hisanori Ibaraki University, Faculty of Science, Associate Professor, 理学部, 助教授 (60142923)
SAITOH Koichi Tohoku University, Faculty of Science, Associate Professor, 理学部, 助教授 (90004457)
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| Project Period (FY) |
1987 – 1989
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| Project Status |
Completed (Fiscal Year 1989)
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| Budget Amount *help |
¥22,900,000 (Direct Cost: ¥22,900,000)
Fiscal Year 1989: ¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 1988: ¥10,000,000 (Direct Cost: ¥10,000,000)
Fiscal Year 1987: ¥11,500,000 (Direct Cost: ¥11,500,000)
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| Keywords | trace metals / speciation / solvent extraction / liquid chromatography / substoichiometry / preconcentration / seaweed / complex / 金属錯体 / ポルフィリン / 薄層クロマトグラフィ- / 有機ヒ素 / 協同効果 / 不足当量分析 / 液体クロマトグラフィー / 生物地球化学的試料 / 金属化学種 / ランタノイド / 協同効果抽出 / ヒ素 / クロロフィル / 原油 |
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| Research Abstract |
The research project was undertaken to give the clues from which selective determination or speciation of trace metal species in biological and geological samples would be developed. The useful and hopeful results were obtained about the following items.
1) Substoicheometric speciation for inorganic arsenic and organic arsenic and its application to seaweed samples. 2) Substoicheometric isotope dilution method for determination of strontium by solvent extraction with crown ether or cryptand, and its application to seaweed samples. 3) Substoicheometric isotope dilution method for determination of sulphur; sulphur was converted to methylen blue and then it was extracted with dodecyl sulphate. 4) Development of a new preconcentration method for neutron activation analysis; trace metals were extracted with diethyldithiocarbamate and collected in polystyrene foam. 5) Synergic extraction of lanthanide(III) with a beta-diketone and neutral bidentate ligand. 6) Evaluation of the reversed phase HPLC retention of metal-beta-diketonato complexes. 7) Reversed-phase HPLC separation of chlorophylls and metal-pheophorbide complexes. 8) Application of size exclusion chromatography/AAS method to fractional determination of vanadium and nickel species in crude oil. 9) High-performance thin-layer chromatographic separation of rare earth complexes with porphyrin.
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