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ID 19966
Eprint ID
19966
フルテキストURL
著者
高柳 俊夫 岡山大学
Tanaka Hiroki 岡山大学
本水 昌二 岡山大学
抄録
Ion association properties of four kinds of anionic divalent azo dyes were investigated in an aqueous solution containing hydrophobic quaternary ammonium ions. The dyes used in this study possessed a hydroxy and a sulfonate group, which existed as a divalent anion in an alkaline solution. In capillary electrophoresis measurements, the apparent electrophoretic mobility of the dyes decreased along with an increase in the concentration of quaternary ammonium ion (Q(+)) in a migrating solution. Ion association constants of the dyes with Q(+), K(ass), were determined by a simulation method of the mobility change using a non-linear least square method, when 1:1 ion associates formed. The increase in log K(ass) was about 0.07 log unit per one methylene group; that is, the hydrophobicity of a pairing ion played an important role in the ion association reaction in aqueous solutions, as well as ion association in solvent extraction systems. Nitro groups of the dyes slightly affected the ion association constants, whereas the position of the sulfonate group in the azo dyes showed a significant change in ion association constants.
キーワード
Ion association
aqueous solution
capillary electrophoresis
azo dye anion
quaternary ammonium ion
発行日
1997-02-10
出版物タイトル
Analytical Sciences
13巻
1号
出版者
日本分析化学会
出版者(別表記)
Japan Society for Analytical Chemistry
開始ページ
11
終了ページ
18
ISSN
0910-6340
NCID
AA10500785
資料タイプ
学術雑誌論文
オフィシャル URL
http://www.journalarchive.jst.go.jp/english/jnlabstract_en.php?cdjournal=analsci1985&cdvol=13&noissue=1&startpage=11
言語
English
著作権者
日本分析化学会
論文のバージョン
publisher
査読
有り
DOI