Stepped gradients on polymeric monolithic columns by photoinitiated grafting

Currivan, Sinéad and Connolly, Damian and Paull, Brett (2015) Stepped gradients on polymeric monolithic columns by photoinitiated grafting. Journal of Separation Science, 38 (21). pp. 3795-3802. ISSN 1615-9306

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Abstract

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 Type:	Article
Additional Information:	Publisher Copyright: © 2015 Wiley-VCH Verlag GmbH and Co. KGaA, Weinheim.
Uncontrolled Keywords:	/dk/atira/pure/subjectarea/asjc/1600/1602
Departments or Groups:
Depositing User:	Admin SSL
Date Deposited:	19 Oct 2022 23:01
Last Modified:	07 Jun 2023 18:41
URI:	http://repository-testing.wit.ie/id/eprint/3640

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