ACID-BASE AND DISTRIBUTION EQUILIBRIA OF 5,7-DICHLORO-2-METHYL-8-HYDROXYQUINOLINE IN BRIJ-35 MICELLAR MEDIA SOLUTIONS

被引：26

作者：

BELTRAN, JL

CODONY, R

GRANADOS, M

IZQUIERDO, A

PRAT, MD

机构：

[1] Departament de Química Analítica, Universitat de Barcelona, 08028 Barcelona

来源：

TALANTA | 1993年 / 40卷 / 02期

关键词：

D O I：

10.1016/0039-9140(93)80316-J

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The acid-base equilibria of 5,7-dichloro-2-methyl-8-hydroxyquinoline (HQ) have been examined spectrophotometrically in aqueous micellar solution of the non-ionic surfactant Brij-35. The differences between apparent pK(a) values at different surfactant concentrations can be quantitatively explained in terms of the extraction constants of the neutral species HQ and the ion-pair Na+Q-. Calculations have been performed by means of SPDIS program, developed in this work to handle multiwavelength spectrophotometric data in micellar systems.

引用

页码：157 / 165

页数：9

共 27 条

[1] BELTRAN J, UNPUB
[2] BILY J, 1986, ANAL LETT, V19, P747
[3] DETERMINATION OF ZINC IN FOODS BY FLUORESCENCE SPECTROSCOPY IN MICELLAR MEDIA
COMPANO, R
GRIMA, A
IZQUIERDO, A
PRAT, MD
[J]. ANALYTICA CHIMICA ACTA, 1989, 227 (01) : 219 - 226
[4] COMPANO R, 1991, QUIM ANAL, V10, P27
[5] DURAND E, 1972, SOLUTIONS NUMERIQUES, V2
[6] Hartley G. S., 1940, T FARADAY SOC, V36, P101
[7] HINZE WL, 1979, SOLUTION CHEM SURFAC, V1, P79
[8] MICELLAR SOLUBILIZATION EQUILIBRIA FOR SOME ANALYTICAL REAGENTS IN AQUEOUS NON-IONIC SURFACTANT SOLUTIONS
HOSHINO, H
SAITOH, T
TAKETOMI, H
YOTSUYANAGI, T
WATANABE, H
TACHIKAWA, K
[J]. ANALYTICA CHIMICA ACTA, 1983, 147 (MAR) : 339 - 345
[9] IZQUIERDO A, 1983, MIKROCHIM ACTA, V1, P371
[10] Izquierdo A., 1988, J CHEMOMETR, V3, P209

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