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%).

Item Type:	Refereed Article
Keywords:	comprehensive LC CE, electrophoresis
Research Division:	Chemical Sciences
Research Group:	Analytical Chemistry
Research Field:	Separation Science
Objective Division:	Expanding Knowledge
Objective Group:	Expanding Knowledge
Objective Field:	Expanding Knowledge in the Chemical Sciences
Author:	Ranjbar, L (Ms Leila Ranjbar Shourabi)
Author:	Gaudry, AJ (Mr Adam Gaudry)
Author:	Breadmore, MC (Professor Michael Breadmore)
Author:	Shellie, RA (Associate Professor Robert Shellie)
ID Code:	106969
Year Published:	2015
Funding Support:	Australian Research Council (FT130100101)
Web of Science® Times Cited:	6
Deposited By:	Chemistry
Deposited On:	2016-02-28
Last Modified:	2018-03-16
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