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Online comprehensive two-dimensional ion chromatography × capillary electrophoresis

journal contribution
posted on 2015-09-01, 00:00 authored by L Ranjbar, A J Gaudry, M C Breadmore, Robert ShellieRobert Shellie
© 2015 American Chemical Society. (Figure Presented). 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%).

History

Journal

Analytical Chemistry

Volume

87

Issue

17

Pagination

8673 - 8678

Publisher

ACS Publications

Location

Washington, D.C.

ISSN

0003-2700

eISSN

1520-6882

Language

eng

Publication classification

C1 Refereed article in a scholarly journal