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ID 114221
著者
Shimakami, Natsumi Tokushima University
キーワード
Hexamethylenetetramine
acid-base equilibrium
capillary zone electrophoresis
acid degradation
資料タイプ
学術雑誌論文
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.
掲載誌名
Analytical Sciences
ISSN
13482246
09106340
cat書誌ID
AA10500785
出版者
The Japan Society for Analytical Chemistry
32
12
開始ページ
1327
終了ページ
1332
発行日
2016-12-10
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
著者版フラグ
出版社版
部局
理工学系