ID | 114221 |
著者 |
Shimakami, Natsumi
Tokushima University
|
キーワード | Hexamethylenetetramine
acid-base equilibrium
capillary zone electrophoresis
acid degradation
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資料タイプ |
学術雑誌論文
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抄録 | The acid-base equilibrium of hexamethylenetetramine (hexamine) was analyzed with its effective electrophoretic mobility by capillary zone electrophoresis. Although hexamine is degradable in a weakly acidic aqueous solution, and the degraded products of ammonia and formaldehyde can be formed, the effective electrophoretic mobility of hexamine was measured in the pH range between 2.8 and 6.9. An acid-base dissociation equilibrium of the protonated hexamine was analyzed based on the mobility change, and an acid dissociation constant of pKa = 4.93 ± 0.01 (mean ± standard error, ionic strength: 0.020 mol dm–3) was determined. The monoprotic acid-base equilibrium of hexamine was confirmed through comparisons of its electrophoretic mobility with the N-ethylquinolinium ion and with the monocationic N-ethyl derivative of hexamine, as well as a slope analysis of the dissociation equilibrium.
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掲載誌名 |
Analytical Sciences
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ISSN | 13482246
09106340
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cat書誌ID | AA10500785
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出版者 | The Japan Society for Analytical Chemistry
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巻 | 32
|
号 | 12
|
開始ページ | 1327
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終了ページ | 1332
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発行日 | 2016-12-10
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EDB ID | |
出版社版DOI | |
出版社版URL | |
フルテキストファイル | |
言語 |
eng
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著者版フラグ |
出版社版
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部局 |
理工学系
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