Evaluation of a microfluidic device for the electrochemical determination of halide content in ionic liquids

Ge, R, Allen, RWK, Aldous, L, Bown, MR, Doy, N, Hardacre, C, MacInnes, JM, McHale, G and Newton, MI ORCID: 0000-0003-4231-1002, 2009. Evaluation of a microfluidic device for the electrochemical determination of halide content in ionic liquids. Analytical Chemistry, 81 (4), pp. 1628-1637.

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Abstract

A microfluidic device designed for electrochemical studies on a microliter scale has been utilized for the examination of impurity levels in ionic liquids (ILs). Halide impurities are common following IL synthesis, and this study demonstrates the ability to quantify low concentrations of halide in a range of ILs to levels of ~5 ppm, even in ILs not currently measurable using other methods such as ion chromatography. To validate the mixer device, the electrochemistry of ferrocene was also examined and compared with spectroscopic and bulk electrochemistry measurements. An automated 'sample preparation, delivery, and calibration' method was developed, and the chip successfully used for linear sweep, cyclic voltammetry (under both quiescent and steady-state flowing conditions), square wave voltammetry, and differential pulse voltammetry. An effective method of electrochemically cleaning the electrodes is also presented.

Item Type: Journal article
Description: Reprinted with permission from GE, R., ALLEN, R.W.K., ALDOUS, L., BOWN, M.R., DOY, N., HARDACRE, C., MACINNES, J.M., MCHALE, G. and NEWTON, M.I., 2009. Evaluation of a microfluidic device for the electrochemical determination of halide content in ionic liquids. Analytical Chemistry, 81 (4), pp. 1628-1637.
Publication Title: Analytical Chemistry
Creators: Ge, R., Allen, R.W.K., Aldous, L., Bown, M.R., Doy, N., Hardacre, C., MacInnes, J.M., McHale, G. and Newton, M.I.
Publisher: American Chemical Society
Date: 2009
Volume: 81
Number: 4
Rights: Copyright 2009 American Chemical Society
Divisions: Schools > School of Science and Technology
Depositing User: EPrints Services
Date Added: 09 Oct 2015 09:58
Last Modified: 09 Jun 2017 13:15
URI: http://irep.ntu.ac.uk/id/eprint/5810

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