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Titolo:
Pre-concentration of non-uniform field electrophoresis for sample introduction of capillary electrophoresis
Autore:
Yang, L; He, YZ; Gan, WE; Lin, XQ; Zhao, YQ; Qu, QS;
Indirizzi:
Univ Sci & Technol China, Dept Chem, Hefei 230026, Peoples R China Univ Sci & Technol China Hefei Peoples R China 230026 6, Peoples R China
Titolo Testata:
JOURNAL OF CHROMATOGRAPHY A
fascicolo: 1-2, volume: 932, anno: 2001,
pagine: 13 - 20
Fonte:
ISI
Lingua:
ENG
Soggetto:
LARGE-VOLUME STACKING; ZONE-ELECTROPHORESIS; QUANTITATIVE-ANALYSIS; INJECTION; ANIONS; ISOTACHOPHORESIS; ELECTROSTACKING; PRETREATMENT;
Keywords:
non-uniform field electrophoresis; field-amplified sample injection; pre-concentration; propranolol; metoprolol;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Physical, Chemical & Earth Sciences
Citazioni:
24
Recensione:
Indirizzi per estratti:
Indirizzo: He, YZ Univ Sci & Technol China, Dept Chem, Hefei 230026, Peoples R China Univ Sci & Technol China Hefei Peoples R China 230026 les R China
Citazione:
L. Yang et al., "Pre-concentration of non-uniform field electrophoresis for sample introduction of capillary electrophoresis", J CHROMAT A, 932(1-2), 2001, pp. 13-20

Abstract

A new sample introduction method of capillary electrophoresis, in which field-amplified sample injection was combined with a pre-concentration of non-uniform field electrophoresis, is presented in this paper, With an additional pre-concentration voltage applied to sample solution, a non-uniform electric field was generated, with which analytical cations or anions were pre-concentrated around an electrode adjacent to the injection end of capillary. After the pre-concentration, analytical ions were injected into the capillary and stacked at the boundary between sample and buffer solution insidecapillary by field-amplified injection technique. In contrast to the conventional field-amplified injection, larger concentration factor and higher analytical sensitivity were obtained with the improved pre-concentration method. Its concentration factor was about 10 similar to 15 fold as that of field-amplified sample injection. (C) 2001 Elsevier Science B.V. All rights reserved.

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Documento generato il 09/04/20 alle ore 20:00:18