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https://hdl.handle.net/20.500.14094/90004065
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2024-05-04
22:24 集計
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90004065 (fulltext)
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3.32 MB
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メタデータID
90004065
アクセス権
open access
出版タイプ
Accepted Manuscript
タイトル
Quantitative NMR of quadrupolar nucleus as a novel analytical method: hydrolysis behaviour analysis of aluminum ion
著者
Maki, Hideshi ; Sakata, Genki ; Mizuhata, Minoru
著者ID
A0923
研究者ID
1000030283873
KUID
https://kuid-rm-web.ofc.kobe-u.ac.jp/search/detail?systemId=0254a9fbd8d16dcd520e17560c007669
著者名
Maki, Hideshi
牧, 秀志
マキ, ヒデシ
所属機関名
環境保全推進センター
著者名
Sakata, Genki
著者ID
A0922
研究者ID
1000010283871
KUID
https://kuid-rm-web.ofc.kobe-u.ac.jp/search/detail?systemId=bc56357c0d6f0f29520e17560c007669
著者名
Mizuhata, Minoru
水畑, 穣
ミズハタ, ミノル
所属機関名
工学研究科
収録物名
Analyst
巻(号)
142(10)
ページ
1790-1799
出版者
Royal Society of Chemistry
刊行日
2017-05-21
公開日
2018-06-01
抄録
In this study, quantitative nuclear magnetic resonance (qNMR) spectroscopy of quadrupolar nuclei has been established. The complicated hydrolysis behavior of the Al3+ ion, which causes fish poisoning and inhibits the growth of plants in environmental water, was clarified by Al-27 qNMR spectroscopy. Highly accurate simultaneous multicomponent quantitative analysis of various hydrolyzed forms of the Al ion was achieved in a non-destructive manner. The calibration curve of the external standard aqueous Al(NO3)(3) solution showed excellent linearity over a very wide concentration range from 1 x 10(-4) to 1 mol L-1 (an increase in concentration of 10 000 times), with a simple experimental and analytical procedure. Furthermore, the weaknesses of the conventional Ferron assay and the advantages of Al-27 qNMR spectroscopy were considered. The quantitative determination error for the free [Al(H2O)(6)](3)(+) ion and the trinuclear complex, which has a high complexation rate, is higher in the Ferron assay than in the Al-27 qNMR technique. The concentrations of four Al species were directly determined by Al-27 qNMR, namely, free [Al(H2O)(6)](3)(+), the trinuclear complex, Al(OH)(4)(-), and tridecameric hydrolyzed Al, which has a Keggin structure. The concentration of the tridecamer rapidly increased until 100 min after NaOH addition, and showed a local maximum after 1 week. In addition, the concentration of colloidal Al hydroxide, which cannot be detected by NMR spectroscopy, was determined by numerical analysis. This species was generated in the initial stage of reaction, and then the tridecamer formed very slowly.
カテゴリ
環境保全推進センター
工学研究科
学術雑誌論文
権利
©2017 Royal Society of Chemistry
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資源タイプ
journal article
言語
English (英語)
ISSN
0003-2654
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eISSN
1364-5528
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関連情報
DOI
https://doi.org/10.1039/c7an00067g
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