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Standardization of potentiometric sensors and acid-base behaviour of a series of bases in nitrobenzene

被引：6
作者：
Barrón, D
Buti, S
Barbosa, J
机构：
[1] Univ Barcelona, Dept Analyt Chem, E-08028 Barcelona, Spain
[2] Univ Politecn Catalunya, Dept Chem Engn, Barcelona 08800, Spain
来源：
ANALYTICA CHIMICA ACTA | 2000年 / 403卷 / 1-2期
关键词：
standardization; nitrobenzene; dissociation constants; bases; resolution of acid strength;
D O I：
10.1016/S0003-2670(99)00636-4
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
The dissociation constant of picric acid in nitrobenzene, pK(a) = 6.63, was established spectrophotometrically, and the standardization of potentiometric systems in this medium using picric acid titration is proposed as a standard method. The acid-base equilibria of a series of bases in nitrobenzene were also studied. The PKHB+ values of the protonated bases of various structure were determined and compared with the PKHB+ values in water and acetonitrile in order to evaluate the resolution of acid strength in these media. (C) 2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：349 / 354
页数：6
相关论文
共 23 条
[1]  
[Anonymous], WILEY SERIES SOLUTIO
[2]   A potentiometric study of acid-base equilibria of substituted pyridines in acetonitrile [J].
Augustin-Nowacka, D ;
Chmurzyñski, L .
ANALYTICA CHIMICA ACTA, 1999, 381 (2-3) :215-220
[3]   AUTOPROTOLYSIS CONSTANTS AND STANDARDIZATION OF THE GLASS-ELECTRODE IN ACETONITRILE WATER MIXTURES - EFFECT OF SOLVENT COMPOSITION [J].
BARBOSA, J ;
SANZNEBOT, V .
ANALYTICA CHIMICA ACTA, 1991, 244 (02) :183-191
[4]   Chromatographic behaviour of ionizable compounds in liquid chromatography.: Part 1.: pH scale, pKa and pHs values for standard buffers in tetrahydrofuran-water [J].
Barbosa, J ;
Barrón, D ;
Butí, S .
ANALYTICA CHIMICA ACTA, 1999, 389 (1-3) :31-42
[5]   EFFECT OF THE SOLVENT ON THE EQUILIBRIA OF ACID-BASE INDICATORS IN APROTIC AND AMPHIPROTIC SOLVENTS [J].
BARBOSA, J ;
BOSCH, CM ;
SANZNEBOT, V .
MIKROCHIMICA ACTA, 1992, 106 (3-6) :327-337
[6]   EQUILIBRIUM-CONSTANTS AND ASSAY OF BASES IN ACETONITRILE [J].
BARBOSA, J ;
SANZNEBOT, V ;
TORRERO, E .
TALANTA, 1991, 38 (04) :425-432
[7]   STANDARDIZATION OF POTENTIOMETRIC SENSORS IN TETRAHYDROFURAN [J].
BARBOSA, J ;
BARRON, D ;
BOSCH, E ;
ROSES, M .
ANALYTICA CHIMICA ACTA, 1992, 264 (02) :229-239
[8]   PKPOT, a program for the potentiometric study of ionic equilibria in aqueous and non-aqueous media [J].
Barbosa, J ;
Barron, D ;
Beltran, JL ;
SanzNebot, V .
ANALYTICA CHIMICA ACTA, 1995, 317 (1-3) :75-81
[9]   ACID-BASE EQUILIBRIA AND ASSAY OF BENZODIAZEPINES IN ACETONITRILE MEDIUM [J].
BARBOSA, J ;
SANZNEBOT, V .
TALANTA, 1989, 36 (08) :837-842
[10]   RESOLUTION OF ACID STRENGTH IN TETRAHYDROFURAN OF SUBSTITUTED BENZOIC-ACIDS [J].
BARBOSA, J ;
BARRON, D ;
BOSCH, E ;
ROSES, M .
ANALYTICA CHIMICA ACTA, 1992, 265 (01) :157-165
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