Analysis of halides, oxyhalides and metal oxoacids by capillary electrophoresis with suppressed electroosmotic flow

Tomoyoshi Soga, Yoshinori Inoue, Gordon A. Ross

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

A rapid and easy method for the determination of halides, oxyhalides and metal oxoacids by capillary electrophoresis was developed. This is the first paper to report their simultaneous analysis. Electroosmotic flow was suppressed more than 40-fold by using a poly(ethyleneglycol)-coated capillary, compared with that in a bare fused-silica capillary under similar conditions. Using this capillary, the separation of eleven anions was accomplished. Anion migration was dependent only on their mobility and detection was carried out directly with a diode-array detector. The R.S.D.s were better than 0.6% for migration time and between 1.0% and 3.4% for peak area. Calibration graphs for all the anions were linear, with correlation coefficients better than 0.9995. Using stacking sample preconcentration, the achievable lower detection limits were found to be in the range 14-260 μg 1-1. This represents a 33-43-fold increase in sensitivity over the results obtained by using 200 mbar·s pressure injection.

Original languageEnglish
Pages (from-to)421-428
Number of pages8
JournalJournal of Chromatography A
Volume718
Issue number2
DOIs
Publication statusPublished - 1995 Dec 22
Externally publishedYes

Fingerprint

Electroosmosis
Keto Acids
Capillary electrophoresis
Capillary Electrophoresis
Anions
Metals
Fused silica
Silicon Dioxide
Calibration
Limit of Detection
Diodes
Detectors
Pressure
Injections

Keywords

  • Capillary columns
  • Capillary electrophoresis
  • Electroosmotic flow
  • Halides
  • Metal oxoacids
  • Oxoacids
  • Oxyhalides

ASJC Scopus subject areas

  • Biochemistry
  • Analytical Chemistry
  • Organic Chemistry

Cite this

Analysis of halides, oxyhalides and metal oxoacids by capillary electrophoresis with suppressed electroosmotic flow. / Soga, Tomoyoshi; Inoue, Yoshinori; Ross, Gordon A.

In: Journal of Chromatography A, Vol. 718, No. 2, 22.12.1995, p. 421-428.

Research output: Contribution to journalArticle

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