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Towards high capacity latex-coated porous polymer monoliths as ion-exchange stationary phases


Hutchinson, J and Hilder, EF and Shellie, RA and Smith, JA and Haddad, PR, Towards high capacity latex-coated porous polymer monoliths as ion-exchange stationary phases, Analyst, 131, (2) pp. 215-221. ISSN 0003-2654 (2006) [Refereed Article]

DOI: doi:10.1039/b511398a


The preparation of high capacity agglomerated monolithic ion-exchangers for capillary ion chromatography is described. Post-modification of reactive monoliths was investigated as an alternative to co-polymerisation of a suitable functional monomer with an overarching goal of increasing ion-exchange capacity. Direct sulfonation of poly styrene-co-divinyl benzene monoliths using concentrated sulfuric acid or chlorosulfonic acid was unsuccessful even for monoliths containing as low as 8% crosslinker. In contrast, chemical transformation of reactive monoliths containing glycidyl methacrylate was used to increase the ion-exchange capacity by up to more than thirty-fold with ion exchange capacities of 14-29 μequiv g-1 achieved. Three different reactions were considered, including reaction with 4-hydroxybenenesulfonic acid under basic conditions; reaction with thiobenzoic acid followed by transformation to a reactive thiol and the subsequent oxidation to the sulfonic acid; and direct sulfonation with sodium sulfite. Of these, the reaction with sodium sulfite resulted in the most significant increase in the capacity and the best separation performance. In the isocratic mode separation efficiencies of over 13 500 plates m-1 were observed (for iodate). The separation of seven inorganic anions was also demonstrated using a hydroxide gradient. © The Royal Society of Chemistry 2006.

Item Details

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
UTAS Author:Hutchinson, J (Dr Joseph Hutchinson)
UTAS Author:Hilder, EF (Professor Emily Hilder)
UTAS Author:Shellie, RA (Associate Professor Robert Shellie)
UTAS Author:Smith, JA (Associate Professor Jason Smith)
UTAS Author:Haddad, PR (Professor Paul Haddad)
ID Code:43011
Year Published:2006
Web of Science® Times Cited:76
Deposited By:Chemistry
Deposited On:2006-08-01
Last Modified:2009-09-22

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