1987 Fiscal Year Final Research Report Summary
Study on Preconcentration Methods for the Determination of Trace Elements
| Project/Area Number |
61303007
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| Research Category |
Grant-in-Aid for Co-operative 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 | Kanazawa University |
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Principal Investigator |
TERADA Kikuo Prof. Faculty of Science, Kanazawa University, 理学部, 教授 (50019460)
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| Co-Investigator(Kenkyū-buntansha) |
MATSUI Masakazu Prof. Institute for Chemical Research, Kyoto University, 化学研究所, 教授 (90027037)
NISHIKAWA Yasuharu Prof. Faculty of Science and Technology, Kinki University, 理工学部, 教授 (10088312)
SUZUKI Nobuo Prof. Faculty of Science, Tohoku University, 理学部, 教授 (10006025)
KURODA Rokuro Prof. Faculty of Engineering, Chiba Umiversity, 工学部, 教授 (50009198)
AKAIWA Hideo Prof. Faculty of Engineering, Gunma University, 工学部, 教授 (60008414)
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| Project Period (FY) |
1986 – 1987
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| Keywords | Synergistic extraction / on-line extraction / synthesized chelating resins / complexing agents loaded silica gel / molecular bilayer assemblies / sorption-flotation method / capillary isotachophoresis / 超微量元素予備濃縮法 |
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| Research Abstract |
(1) Synergistic extraction system, dithizone-TOPO, was applied to preconcentration of Cu(II). Synergistic extraction of RE elements using TTA and 1,10-phenanthroline was found to improve not only separation factor but extraction efficiency. The online extraction system was developed for ICP analysis of trace metals. Extraction with chelating-agents mixture was used for simultaneous multi-elements extraction.
(2) Bio-Rad AG 1 resin was used for preconcentration of U and Mo from seawater. The series of chelating resins was developed and applied to enrich the rare metals. MBT/SG and thionalide/SG were used for concentration of Ag and Sb, resevtively. Poly(chlorotrifluoroethylene) was found te adsorb many metal complexes and applied to speciation and preconcentration of trace metals in natural waters. "EXPAPIERF-2" was used for enrichment of Th, Zr, Fe, Sc, Y,Ga and RE elements.
(3) Metal preconcentration by molecular bilayer assemblies was studied.
(4) Amberlite XAD-2 resin treated with In(III) was used for preconcentration of humic complexes and coprecipitation-flotation technique was developed to measure the molecular weight distribution and adsorption ability of humic acid.
(5) Metal concentration with non-aqueous isotachophoresis was studied for separation of heavy metal ions after extraction of the DDTC chelates into nitrobenzene.
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