Enhancement of conductometric detection of weak acids in ion chromatography

被引：7

作者：

Caliamanis, A ^{[1
]}

McCormick, MJ ^{[1
]}

Carpenter, PD ^{[1
]}

机构：

[1] RMIT Univ, Dept Appl Chem, Melbourne, Vic 3001, Australia

来源：

JOURNAL OF CHROMATOGRAPHY A | 1999年 / 850卷 / 1-2期

关键词：

conductometric detection; detection; LC; mobile phase composition; boric acid; weak acids;

D O I：

10.1016/S0021-9673(99)00560-9

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

Anions of weak acids can represent a problem when determined via chemically suppressed ion chromatography as the acids can be weakly ionised, giving low conductivity and hence low sensitivity. Previous work showed that converting some weak acids back to their sodium salts, using a second micromembrane suppressor, greatly enhanced conductivity and thus sensitivity. This paper will discuss further work in optimising the conversion for boric acid by using sodium salts of EDTA and the mechanisms involved. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：85 / 98

页数：14

共 19 条

[1]

ALIDLER KJ, 1982, PHYSICAL CHEM, P821

[2] 2-DIMENSIONAL CONDUCTOMETRIC DETECTION IN ION CHROMATOGRAPHY - POSTSUPPRESSOR CONVERSION OF ELUITE ACIDS TO A BASE [J].

BERGLUND, I ;

DASGUPTA, PK .

ANALYTICAL CHEMISTRY, 1991, 63 (19) :2175-2183

[3] 2-DIMENSIONAL CONDUCTOMETRIC DETECTION IN ION CHROMATOGRAPHY - POSTSUPPRESSOR CONVERSION OF ELUITE ACIDS TO A SALT [J].

BERGLUND, I ;

DASGUPTA, PK .

ANALYTICAL CHEMISTRY, 1992, 64 (23) :3007-3012

[4] 2-DIMENSIONAL CONDUCTOMETRIC DETECTION IN ION CHROMATOGRAPHY - SEQUENTIAL SUPPRESSED AND SINGLE COLUMN DETECTION [J].

BERGLUND, I ;

DASGUPTA, PK ;

LOPEZ, JL ;

NARA, O .

ANALYTICAL CHEMISTRY, 1993, 65 (09) :1192-1198

[5] Conductometric detection of anions of weak acids in chemically suppressed ion chromatography: Critical point concentrations [J].

Caliamanis, A ;

McCormick, MJ ;

Carpenter, PD .

ANALYTICAL CHEMISTRY, 1999, 71 (03) :741-746

[6] Conductometric detection of anions of weak acids in chemically suppressed ion chromatography [J].

Caliamanis, A ;

McCormick, MJ ;

Carpenter, PD .

ANALYTICAL CHEMISTRY, 1997, 69 (16) :3272-3276

[7]

CALIAMANIS A, 1995, THESIS RIMT MELBOURN

[8] SIMULTANEOUS DETERMINATION OF LOW-MOLECULAR-WEIGHT ORGANIC-ACIDS IN SOIL SOLUTION BY ION CHROMATOGRAPHY [J].

ELKHATIB, EA .

ZEITSCHRIFT FUR PFLANZENERNAHRUNG UND BODENKUNDE, 1990, 153 (03) :201-205

[9]

HADDAD PR, 1990, J CHROMATOGRAPHY LIB, V46, P10

[10]

HARRIS DC, 1995, QUANTITATIVE CHEM AN, P318

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