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Titolo:
Capillary electrophoretic analysis of anions in a multi-anion background electrolyte: Interference of system peaks
Autore:
Rabiller-Baudry, M; Chaufer, B; Rabiller, P;
Indirizzi:
Univ Rennes 1, INRA, UA, Lab Procedes Separat, Rennes, France Univ Rennes 1 Rennes France A, UA, Lab Procedes Separat, Rennes, France Univ Rennes 1, GMCM, UMR 6626, CNRS, F-35042 Rennes, France Univ Rennes 1Rennes France F-35042 R 6626, CNRS, F-35042 Rennes, France
Titolo Testata:
CHROMATOGRAPHIA
fascicolo: 5-6, volume: 49, anno: 1999,
pagine: 309 - 316
SICI:
0009-5893(199903)49:5-6<309:CEAOAI>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
ZONE ELECTROPHORESIS; SAMPLE ZONES;
Keywords:
capillary electrophoresis; anions; system peaks;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Physical, Chemical & Earth Sciences
Citazioni:
11
Recensione:
Indirizzi per estratti:
Indirizzo: Rabiller-Baudry, M Univ Rennes 1, INRA, UA, Lab Procedes Separat, Rennes, France Univ Rennes 1 Rennes France Separat, Rennes, France
Citazione:
M. Rabiller-Baudry et al., "Capillary electrophoretic analysis of anions in a multi-anion background electrolyte: Interference of system peaks", CHROMATOGR, 49(5-6), 1999, pp. 309-316

Abstract

This study deals with the simultaneous analysis of UV-transparent anions by capillary electrophoresis with indirect UV-detection. With a background electrolyte (BGE) based on UV-absorbing chromate and UV-transparent berate, the interference of system peaks with those of sample anions (chloride, sulfate, citrate, phosphate) is shown. The existence of such system peaks, andtheir position in relation to the peaks of the sample anions, are explained on the basis of the eigenpeak theory proposed by Poppe [1]. With this BGE the system peaks were manifested as a negative peak followedby a positive peak. Their shapes depended on the relative mobilities of the analyte and BGE anions and their areas depended on the amount of sample. The mobility of the system peak depends on the borate/boric acid mobility, which was adjusted by slight variation of the pH close to its pK(a) - pH isthe key factor governing system-peak mobility. When the locations of the system peaks are optimized, the quantification of citrate can be achieved; this was successfully used for determination of anions in milk.

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Documento generato il 15/07/20 alle ore 15:00:25