ACID-BASE BEHAVIOR OF SOME SUBSTITUTED AZO DYES IN AQUEOUS N, N-DIMETHYLFORMAMIDE MIXTURES

被引：17

作者：

GONZALEZ, AG

HERRADOR, MA

ASUERO, AG

机构：

[1] Department of Analytical Chemistry, University of Seville

来源：

ANALYTICA CHIMICA ACTA | 1991年 / 246卷 / 02期

关键词：

SPECTROPHOTOMETRY; ACID-BASE EQUILIBRIA; AZO DYES; DISSOCIATION CONSTANTS;

D O I：

10.1016/S0003-2670(00)80982-4

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The dissociation constants of six azo dye indicators were evaluated spectrophotometrically in 10-80% (v/v) N,N-dimethylformamide-water mixtures at 25 +/- 0.1-degrees-C, by applying an empirical pH correction. The acid-base behaviour of these indicators in the media studied is explained on the basis of electrostatic and hydrophobic interactions between the indicators and the solvent.

引用

页码：429 / 434

页数：6

共 25 条

[1]

[Anonymous], 1971, COLOUR INDEX, V3rd ed.

[2]

BADOZLAMBLING J, 1964, B SOC CHIM FR, P1354

[3] PREFERENTIAL SOLVATION AND HYDROPHOBIC HYDRATION OF POLYOLS IN MIXTURES OF WATER AND N,N-DIMETHYLFORMAMIDE [J].