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Titolo:
CAPILLARY ELECTROPHORETIC SEPARATION OF ORGANOPHOSPHONIC ACIDS USING BORATE ESTERIFICATION AND DIRECT UV DETECTION
Autore:
ROBINS WH; WRIGHT BW;
Indirizzi:
PACIFIC NW LABS,DEPT CHEM SCI,POB 999 RICHLAND WA 99352
Titolo Testata:
Journal of chromatography
fascicolo: 2, volume: 680, anno: 1994,
pagine: 667 - 673
Fonte:
ISI
Lingua:
ENG
Soggetto:
PERFORMANCE LIQUID-CHROMATOGRAPHY; ANION-EXCHANGE CHROMATOGRAPHY; ZONE ELECTROPHORESIS; ELECTROCHEMICAL DETECTION; CONDUCTOMETRIC DETECTION; ELUTION CHARACTERISTICS; METHYLPHOSPHONIC ACIDS; COMPLEX-FORMATION; ION; ELUENTS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
35
Recensione:
Indirizzi per estratti:
Citazione:
W.H. Robins e B.W. Wright, "CAPILLARY ELECTROPHORETIC SEPARATION OF ORGANOPHOSPHONIC ACIDS USING BORATE ESTERIFICATION AND DIRECT UV DETECTION", Journal of chromatography, 680(2), 1994, pp. 667-673

Abstract

One major challenge in the analysis of small ions by capillary zone electrophoresis (CZE) is detection. The most common commercially available detector for CZE is based on UV absorbance. For many small molecules, however, little UV absorbance occurs above 210 nm, limiting the usefulness of this detection method. Carbohydrates, alcohols and amides have been separated and directly detected by complexation with sodium berate. It has been shown that these complexes have UV absorbances in the range of 220 to 280 nm, whereas the analytes alone are UV transparent at energies less than 200 nm. Separation and direct detection of organophosphonic acids using sodium berate as both a buffer and derivatization agent is demonstrated. Detection limits on the order of nanograms are reported with separations that exhibit 10 000 to 1 740 000 theoretical plates. The ultraviolet, infrared, nuclear magnetic resonanceand mass spectra of various borate/phosphonic acid esters are explored.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/11/20 alle ore 18:12:21