| Project/Area Number |
02453034
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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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 | Hiroshima University |
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Principal Investigator |
KUMAMARU Takahiro Hiroshima Univ., Fac. Sci., Prof., 理学部, 教授 (50033816)
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| Co-Investigator(Kenkyū-buntansha) |
FUJIWARA Kitao Hiroshima Univ., Fac. Integ. Arts and Sci., Prof., 総合科学部, 教授 (90090521)
OKAMOTO Yasuaki Hiroshima Univ., Fac. Sci., Research Associate, 理学部, 助手 (40213988)
FUJIWARA Terufumi Hiroshima Univ., Fac. Sci., Research Associate, 理学部, 助手 (80127703)
IWAMOTO Etsuro Hiroshima Univ., Fac. Sci., Assoc. Prof., 理学部, 助教授 (80033918)
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| Project Period (FY) |
1990 – 1991
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| Project Status |
Completed (Fiscal Year 1991)
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| Budget Amount *help |
¥5,100,000 (Direct Cost: ¥5,100,000)
Fiscal Year 1991: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1990: ¥4,300,000 (Direct Cost: ¥4,300,000)
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| Keywords | Hybrid Method / Trace Analysis / Extraction By Liquid Surfactant Membrane / Ion Exchange Membrane Tube / Electrodialysis / Chemiluminescence Analysis / Ion Chromatography / Gas Phase Chemiluminescence Analysis |
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| Research Abstract |
Chemical information takes a very important role in material, life and environmental sciences and more efforts should be made to get accurate information. Nowadays advanced spectrometric and chromatographic methods such as atomic absorption spectrometry, inductively coupled plasma atomic emission spectrometry, and ion chromatography are most popular for the determination of trace elements. However, sensitivity and selectivity limitations still prevent their direct use for ultra-trace analysis. In this study, we introduced several hybrid system to the instrumental methods to improve their performances.
Various approaches are described as follows : (1) Graphite furnace atomic absorption spectrometric determination of ultra-trace levels of Cr, Mn, Co, Ni, Cu, and Cd in refined water after solvent extraction/back extraction using W/O/W emulsions as liquid surfactant membranes. (2) Chemiluminescence analysis of Au based on the reaction of chloroauric acid with luminal in reverse micelles. (3) Electrodialysis pretreatment systems for ion chromatography of Ca and Mg in strongly acidic samples and of halide ions in strongly basic samples. (4) Ozone gas-phase chemiluminescence analysis of Si based on the generation of silane by the solid-phase reduction of silicic acid and LiAlH_4 followed by the gas-phase reaction of ozone and the evolution silane.
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