Direct determination of bromide ions in seawater by capillary zone electrophoresis using polyethyleneimine-coated capillaries

Nilgün Kocatürk, Nevin Öztekin, F. Bedia Erim*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

A rapid and simple capillary electrophoretic method was developed for the direct determination of bromide ion in seawater. We have found an effective method, based on the use of polyethyleneimine-coated capillaries and the addition of sodium chloride to the background electrolyte. The use of coated capillaries with a cationic polymer changes the direction of the electroosmotic flow in the capillary, which favors the migration speed of the bromide ion and enables the use of low salt concentrations in the separation electrolyte. Bromide ion in seawater can be determined within 2 min using this system and 20 mmol L-1 NaCl-containing separation electrolyte. The detection limit for the bromide ion was 0.45 μg ml-1. The method was applied to the determination of bromide ion in seawater samples collected from the Bosphorus and the Black Sea. Bromide contents in samples from 0 to 72 m depths varied between 33.2 and 72.8 mg L-1 with a mean 3.0% RSD.

Original languageEnglish
Pages (from-to)1207-1211
Number of pages5
JournalAnalytical and Bioanalytical Chemistry
Volume377
Issue number7-8
DOIs
Publication statusPublished - Dec 2003

Keywords

  • Bromide
  • Capillary electrophoresis
  • Seawater

Fingerprint

Dive into the research topics of 'Direct determination of bromide ions in seawater by capillary zone electrophoresis using polyethyleneimine-coated capillaries'. Together they form a unique fingerprint.

Cite this