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An open tubular ion chromatograph

Citation

Yang, B and Zhang, M and Kanyanee, T and Stamos, BN and Dasgupta, PK, An open tubular ion chromatograph, Analytical Chemistry, 86, (23) pp. 11554-11561. ISSN 0003-2700 (2014) [Refereed Article]

Copyright Statement

© 2014 American Chemical Society

DOI: doi:10.1021/ac503249t

Abstract

We describe an open tubular ion chromatograph (OTIC) that uses anion exchange latex coated 5 μm radius silica and 9.8 μm radius poly(methyl methacrylate) tubes and automated time/pressure based hydrodynamic injection for pL–nL scale injections. It is routinely possible to generate 50 000 plates or more (up to 150 000 plates/m, columns between 0.3 and 0.8 m have been used), and as such, fast separations are possible, comparable to or in some cases better than the current practice of IC. With an optimized admittance detector, nonsuppressed detection permits LODs of submicromolar to double digit micromolar for a variety of analytes. However, large volume injections are possible and can significantly improve on this. A variety of eluents, the use of organic modifiers, and variations of eluent pH can be used to tailor a given separation. The approach is discussed in the context of extraterrestrial exploration, especially Mars, where the existence of large amounts of perchlorate in the soil needs to be confirmed. These columns can survive drying and freezing, and small footprint, low power consumption, and simplicity make OTIC a good candidate for such a mission.

Item Details

Item Type:Refereed Article
Keywords:ion chromatograph, open tubular capillary column
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:Zhang, M (Dr Min Zhang)
ID Code:104674
Year Published:2014
Web of Science® Times Cited:12
Deposited By:Chemistry
Deposited On:2015-11-18
Last Modified:2017-10-29
Downloads:0

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