title: Online comprehensive two-dimensional ion chromatography × capillary electrophoresis.
abstract: A comprehensively coupled online two-dimensional ion chromatography-capillary electrophoresis (IC × CE) system for quantitative analysis of inorganic anions and organic acids in water is introduced. The system employs an in-house built sequential injection-capillary electrophoresis instrument and a nonfocusing modulation interface comprising a tee-piece and a six-port two-position injection valve that allows comprehensive sampling of the IC effluent. High field strength (+2 kV/cm) enables rapid second-dimension separations in which each peak eluted from the first-dimension separation column is analyzed at least three times in the second dimension. The IC × CE approach has been successfully used to resolve a suite of haloacetic acids, dalapon, and common inorganic anions. Two-dimensional peak capacity for IC × CE was 498 with a peak production rate of 9 peaks/min. Linear calibration curves were obtained for all analytes from 5 to 225 ng/mL (except dibromoacetic acid (10-225 ng/mL) and tribromoacetic acid (25-225 ng/mL)). The developed approach was used to analyze a spiked tap water sample, with good measured recoveries (69-119%).
authors.affiliation: Australian Centre for Research on Separation Science, School of Physical Sciences, University of Tasmania , Private Bag 75, Hobart, Tasmania 7001, Australia.
authors.forename: Leila
authors.initials: L
authors.lastname: Ranjbar
authors.affiliation: Australian Centre for Research on Separation Science, School of Physical Sciences, University of Tasmania , Private Bag 75, Hobart, Tasmania 7001, Australia.
authors.forename: Adam J
authors.initials: AJ
authors.lastname: Gaudry
authors.affiliation: Australian Centre for Research on Separation Science, School of Physical Sciences, University of Tasmania , Private Bag 75, Hobart, Tasmania 7001, Australia.
authors.forename: Michael C
authors.initials: MC
authors.lastname: Breadmore
authors.affiliation: Australian Centre for Research on Separation Science, School of Physical Sciences, University of Tasmania , Private Bag 75, Hobart, Tasmania 7001, Australia.
authors.forename: Robert A
authors.initials: RA
authors.lastname: Shellie