PHOTOMETRIC REAGENTS FOR ALKALI-METAL IONS, BASED ON CROWN-ETHER COMPLEX-FORMATION .3. 4'-PICRYLAMINOBENZO-15-CROWN-5 DERIVATIVES

被引：68

作者：

NAKAMURA, H

TAKAGI, M

UENO, K

机构：

[1] Department of Organic Synthesis, Faculty of Engineering, Kyushu University, Higashi-ku, Fukuoka, 812, Hakozaki

来源：

TALANTA | 1979年 / 26卷 / 10期

关键词：

D O I：

10.1016/0039-9140(79)80127-7

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

An extraction study of alkali metal cations has been made with crown-ether reagents, 4′-picrylaminobenzo-15-crown-5 derivatives (HL). On dissociation in alkaline medium, the orange HL gives the blood-red anion L- and extracts alkali metal ions into chloroform as coloured complexes of composition ML.HL or ML. The ease of extraction decreases in the order, K+ > Rb+ > Cs+ > Na+ > Li+. The extracted complexes are ML.HL for K+ and Rb+, and both ML.HL and ML for Na+. The Li+ complex is not extracted. The photometric determination of 10-80Oppm of K+ is possible in the presence of other alkali and alkaline earth metal ions. © 1979.

引用

页码：921 / 927

页数：7

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