eCite Digital Repository

Solvent Enhanced Ion Chromatography of Alkaline Earth, Transition and Heavy Metals Ions on Porous Monolithic Silica

Citation

Sugrue, E and Nesterenko, PN and Paull, B, Solvent Enhanced Ion Chromatography of Alkaline Earth, Transition and Heavy Metals Ions on Porous Monolithic Silica , Analytica Chimica Acta, 553, (1-2) pp. 27-35. ISSN 0003-2670 (2005) [Refereed Article]

DOI: doi:10.1016/j.aca.2005.07.068

Abstract

The high-performance separation of alkaline earth and transition metal ions on a bare porous silica 10.0 cm × 0.46 cm monolith (Merck Chromolith Si) was achieved using solvent enhanced ion chromatography. Using acetonitrile or methanol based ammonium and sodium acetate buffered mobile phases, the effect upon cation retention of mobile phase ionic strength, organic content and pH were evaluated. Increasing mobile phase acetonitrile concentration from 60 to 80% acetonitrile resulted in 10-15-fold increases in cation retention due to reduced hydration of the metal ions and hence enhanced ion-exchange interactions with surface silanol groups. The optimised conditions for the separation of Cu(II), Cd(II), Ni(II), Co(II) and Mn(II) were found to be 80% MeCN with 10.3 mM ammonium acetate (pH 4.6). Detection of transition metal ions was obtained using post-column reaction with 4-(2-pyridylazo) resorcinol and absorbance at 510 nm. Under elevated flow conditions (up to 5 mL/min), total runs times could be reduced to under 4 min. Optimum peak efficiencies were seen at flow rates of between 1.5 and 2 mL/min and were equivalent to an average efficiency of 25,000 N/m. © 2005 Elsevier B.V. All rights reserved.

Item Details

Item Type:Refereed Article
Research Division:Chemical Sciences
Research Group:Physical Chemistry (incl. Structural)
Research Field:Colloid and Surface Chemistry
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Chemical Sciences
Author:Nesterenko, PN (Professor Pavel Nesterenko)
Author:Paull, B (Professor Brett Paull)
ID Code:47709
Year Published:2005
Web of Science® Times Cited:20
Deposited By:Chemistry
Deposited On:2007-09-20
Last Modified:2011-08-18
Downloads:0

Repository Staff Only: item control page