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A new N-hydroxyethyliminodiacetic acid modified core-shell silica phase for chelation ion chromatography of alkaline earth, transition and rare earth elements

Citation

McGillicuddy, N and Nesterenko, EP and Nesterenko, PN and Stack, EM and Omamogho, JO and Glennon, JD and Paull, B, A new N-hydroxyethyliminodiacetic acid modified core-shell silica phase for chelation ion chromatography of alkaline earth, transition and rare earth elements, Journal of Chromatography A, 1321 pp. 56-64. ISSN 0021-9673 (2013) [Refereed Article]

Copyright Statement

Copyright 2013 Elsevier B.V

DOI: doi:10.1016/j.chroma.2013.10.057

Abstract

Bare core–shell silica (1.7 μm) has been modified with iminodiacetic acid functional groups via standardsilane chemistry, forming a new N-hydroxyethyliminodiacetic acid (HEIDA) functionalised core–shellstationary phase. The column was applied in high-performance chelation ion chromatography and eval-uated for the retention of alkaline earth, transition and heavy metal cations. The influence of nitric acideluent concentration, addition of complexing agent dipicolinic acid, eluent pH and column temperatureon the column performance was investigated. The efficiencies obtained for transition and heavy metalcations (and resultant separations) were comparable or better than those previously obtained for alter-native fully porous silica based chelation stationary phases, and a similarly modified monolithic silicacolumn, ranging from ∼15 to 56 μm HETP. Increasing the ionic strength of the eluent with the additionof KNO3(0.75 M) and increasing the column temperature (70°C) facilitated the isocratic separation of amixture of 14 lanthanides and yttrium in under 12 min, with HETP averaging 18μm (7μm for Ce(III))

Item Details

Item Type:Refereed Article
Keywords:high-performance chelation ion chromatography, core-shell silica particle, N-hydroxyethyliminodiacetic acid, metal ions
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:McGillicuddy, N (Ms Nicola McGillicuddy)
Author:Nesterenko, PN (Professor Pavel Nesterenko)
Author:Paull, B (Professor Brett Paull)
ID Code:87593
Year Published:2013
Web of Science® Times Cited:4
Deposited By:Austn Centre for Research in Separation Science
Deposited On:2013-11-26
Last Modified:2017-11-06
Downloads:0

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