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Capillary ion chromatography with on-column focusing for ultra-trace analysis of methanesulfonate and inorganic anions in limited volume Antarctic ice core samples

Citation

Sanz Rodriguez, E and Poynter, S and Curran, M and Haddad, PR and Shellie, RA and Nesterenko, PN and Paull, B, Capillary ion chromatography with on-column focusing for ultra-trace analysis of methanesulfonate and inorganic anions in limited volume Antarctic ice core samples, Journal of Chromatography A, 1409 pp. 182-188. ISSN 0021-9673 (2015) [Refereed Article]

Copyright Statement

Copyright 2015 Elsevier B.V.

DOI: doi:10.1016/j.chroma.2015.07.034

Abstract

Preservation of ionic species within Antarctic ice yields a unique proxy record of the Earth’s climate his-tory. Studies have been focused until now on two proxies: the ionic components of sea salt aerosol and methanesulfonic acid. Measurement of the all of the major ionic species in ice core samples is typically carried out by ion chromatography. Former methods, whilst providing suitable detection limits, have been based upon off-column preconcentration techniques, requiring larger sample volumes, with potential for sample contamination and/or carryover. Here, a new capillary ion chromatography based analytical method has been developed for quantitative analysis of limited volume Antarctic ice core samples.The developed analytical protocol applies capillary ion chromatography (with suppressed conductivity detection) and direct on-column sample injection and focusing, thus eliminating the requirement for off-column sample preconcentration. This limits the total sample volume needed to 300 μL per analysis,allowing for triplicate sample analysis with <1 mL of sample. This new approach provides a reliable and robust analytical method for the simultaneous determination of organic and inorganic anions, including fluoride, methanesulfonate, chloride, sulfate and nitrate anions. Application to composite ice-core samples is demonstrated, with coupling of the capillary ion chromatograph to high resolution mass spectrometry used to confirm the presence and purity of the observed methanesulfonate peak.

Item Details

Item Type:Refereed Article
Keywords:capillary ion chromatography, on-column focussing, methanesulfonic acid, inorganic anions, Antarctic ice cores, IC-MS
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:Sanz Rodriguez, E (Dr Estrella Sanz Rodriguez)
Author:Poynter, S (Mr Sam Poynter)
Author:Curran, M (Dr Mark Curran)
Author:Haddad, PR (Professor Paul Haddad)
Author:Shellie, RA (Associate Professor Robert Shellie)
Author:Nesterenko, PN (Professor Pavel Nesterenko)
Author:Paull, B (Professor Brett Paull)
ID Code:102255
Year Published:2015
Web of Science® Times Cited:5
Deposited By:Chemistry
Deposited On:2015-08-07
Last Modified:2018-03-17
Downloads:0

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