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Titolo:
Separation of anions by ion chromatography-capillary electrophoresis
Autore:
Li, J; Ding, WL; Fritz, JS;
Indirizzi:
Iowa State Univ Sci & Technol, Ames Lab, US Dept Energy, Ames, IA 50011 USA Iowa State Univ Sci & Technol Ames IA USA 50011 nergy, Ames, IA 50011 USA Iowa State Univ Sci & Technol, Dept Chem, Ames, IA 50011 USA Iowa State Univ Sci & Technol Ames IA USA 50011 Chem, Ames, IA 50011 USA
Titolo Testata:
JOURNAL OF CHROMATOGRAPHY A
fascicolo: 2, volume: 879, anno: 2000,
pagine: 245 - 257
Fonte:
ISI
Lingua:
ENG
Soggetto:
EXCHANGE ELECTROKINETIC CHROMATOGRAPHY; INORGANIC ANIONS; ZONE ELECTROPHORESIS; MIGRATION BEHAVIOR; LIQUID-CHROMATOGRAPHY; CATIONIC POLYMERS; SELECTIVITY; SULFATE; WATER; OPTIMIZATION;
Keywords:
ion chromatography-capillary electrophoresis; capillary electrophoresis-ion chromatography; background electrolyte composition; inorganic anions; organic acids; poly(diallyldimethylammonium chloride);
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Physical, Chemical & Earth Sciences
Citazioni:
32
Recensione:
Indirizzi per estratti:
Indirizzo: Fritz, JS Iowa State Univ Sci & Technol, Ames Lab, US Dept Energy, Ames, IA 50011 USA Iowa State Univ Sci & Technol Ames IA USA 50011 s, IA 50011 USA
Citazione:
J. Li et al., "Separation of anions by ion chromatography-capillary electrophoresis", J CHROMAT A, 879(2), 2000, pp. 245-257

Abstract

Capillary electrophoresis (CE) with a water-soluble ion-exchange polymer in the background electrolyte is very efficient for the separation of organic and inorganic anions because the ion-exchange selectivity, as well as differences in electrophoretic mobility, can be used for separating sample ions. Poly(diallyldimethylammonium chloride) (PDDAC) was employed for this purpose. A very stable electroosmotic flow was obtained between pH 2.3 and 8.5due to the strong adsorption of PDDAC onto the capillary wall. The effect of ion exchange on the migration of sample anions and their separation was controlled by varying the concentration of PDDAC, the concentration and thetype of salt used in the CE background electrolyte. Addition of organic solvent (e.g., acetonitrile) could also modify the sample migration and the separation. Baseline separations were obtained for anions with very similar mobilities, such as bromide and iodide, naphthalenesulfonates, and bi- and tricarboxylic acids. Typical separation efficiencies were between 195 000 and 429 000 theoretical plates per meter. Ten replicate separations gave an average RSD of 1.0% for migration times of the sample anions studied. Excellent separations were obtained for a variety of samples, including a separation of 17 inorganic and organic anions in less than 6 min. (C) 2000 Elsevier Science B.V. All rights reserved.

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Documento generato il 24/09/20 alle ore 05:51:18