A glycidyl methacrylate-co-ethylene dimethacrylate monolith in capillary format (100 μm/id) has been grafted with chains of poly([2(methacryloyloxy) ethyl] trimethylammonium chloride (poly-META) and applied to the ion-chromatographic separation of selected inorganic anions. Grafting chains of META onto the generic monolithic scaffold resulted in a monolith with ,electrolyte responsive flow permeability', which manifested as increased permeability in the presence of electrolyte solutions. Using an eluent of 2 mM sodium benzoate and on-column contactless conductivity detection, a test mixture of six common anions was isocratically separated and detected within 12 min, with the first four anions baseline resolved within a retention time window of 3.2 min. Retention time precision was ≤1.2% for all anions tested. Separation efficiencies of 15000 N/m were achieved for fluoride at 1 μL/min, with column efficiencies up to 29500 N/m obtained at a lower flow rate of 100 nL/min. Furthermore, repeatability of the column modification procedure using photografting methods was acceptable, with retention times between replicate columns matching within 9%. © 2009 Wiley-VCH Verlag GmbH & Co. KGaA.

Item Type:	Refereed Article
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:	Paull, B (Professor Brett Paull)
ID Code:	72027
Year Published:	2009
Web of Science® Times Cited:	21
Deposited By:	Research Division
Deposited On:	2011-08-18
Last Modified:	2015-01-21
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