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Stepped gradients on polymeric monolithic columns by photoinitiated grafting


Currivan, S and Connolly, D and Paull, B, Stepped gradients on polymeric monolithic columns by photoinitiated grafting, Journal of Separation Science, 38, (21) pp. 3795-3802. ISSN 1615-9306 (2015) [Refereed Article]

Copyright Statement

Copyright 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

DOI: doi:10.1002/jssc.201500776


The surface of polymethacrylate monoliths was functionalized by a post-polymerization modification, by means of a novel photo-initiated graft procedure where the charged monomer, sulfopropyl methacrylate, was controllably grafted stepwise, i.e. with incremental graft energies. The grafting approach was optimized using scanning capacitively coupled contactless conductivity detection. The effect of the localized ion exchange capacity and resultant gradient stationary phase upon ion-exchange chromatographic retention, selectivity, and performance was investigated, and compared to a homogeneously grafted (isotropic) column. The gradient column provided reduced peak widths at half height for both cationic analytes, with a reduction of 34 and 33%, respectively, when compared to the isotropic column.

Item Details

Item Type:Refereed Article
Keywords:polymer monoliths, grafting, gradient stationary phase, C4D, cation exchange, capacitively coupled contactless conductivity detection
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 environmental sciences
UTAS Author:Currivan, S (Dr Sinead Currivan)
UTAS Author:Paull, B (Professor Brett Paull)
ID Code:104620
Year Published:2015
Web of Science® Times Cited:10
Deposited By:Chemistry
Deposited On:2015-11-17
Last Modified:2017-10-29

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