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Evaluation of a Microfluidic Device for the Electrochemical Determination of Halide Content Sin Ionic Liquids.

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Title: Evaluation of a Microfluidic Device for the Electrochemical Determination of Halide Content Sin Ionic Liquids.
Authors: Ge, R.1, Allen, R. W. K.2, Aldous, L.1, Bown, M. R.2, Doy, Nicola3, Hardacre, C.1 c.hardacre@qub.ac.uk, Maclnnes, J. M.2 j.m.macinnes@sheffield.ac.uk, McHale, G.3, Newtons, M. I.3
Source: Analytical Chemistry. 2/15/2009, Vol. 81 Issue 4, p1628-1637. 10p.
Subjects: Microfluidic devices, Microtechnology, Fluidic devices, Electrochemistry, Halides, Ionic liquids, Electrochemical analysis, Voltammetry, Square waves, Electromagnetic waves, Chromatographic analysis
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. [ABSTRACT FROM AUTHOR]
Copyright of Analytical Chemistry is the property of American Chemical Society and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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PubType: Academic Journal
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  Data: Evaluation of a Microfluidic Device for the Electrochemical Determination of Halide Content Sin Ionic Liquids.
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  Data: <searchLink fieldCode="AR" term="%22Ge%2C+R%2E%22">Ge, R.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Allen%2C+R%2E+W%2E+K%2E%22">Allen, R. W. K.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Aldous%2C+L%2E%22">Aldous, L.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Bown%2C+M%2E+R%2E%22">Bown, M. R.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Doy%2C+Nicola%22">Doy, Nicola</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Hardacre%2C+C%2E%22">Hardacre, C.</searchLink><relatesTo>1</relatesTo><i> c.hardacre@qub.ac.uk</i><br /><searchLink fieldCode="AR" term="%22Maclnnes%2C+J%2E+M%2E%22">Maclnnes, J. M.</searchLink><relatesTo>2</relatesTo><i> j.m.macinnes@sheffield.ac.uk</i><br /><searchLink fieldCode="AR" term="%22McHale%2C+G%2E%22">McHale, G.</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Newtons%2C+M%2E+I%2E%22">Newtons, M. I.</searchLink><relatesTo>3</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Analytical+Chemistry%22">Analytical Chemistry</searchLink>. 2/15/2009, Vol. 81 Issue 4, p1628-1637. 10p.
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  Data: <searchLink fieldCode="DE" term="%22Microfluidic+devices%22">Microfluidic devices</searchLink><br /><searchLink fieldCode="DE" term="%22Microtechnology%22">Microtechnology</searchLink><br /><searchLink fieldCode="DE" term="%22Fluidic+devices%22">Fluidic devices</searchLink><br /><searchLink fieldCode="DE" term="%22Electrochemistry%22">Electrochemistry</searchLink><br /><searchLink fieldCode="DE" term="%22Halides%22">Halides</searchLink><br /><searchLink fieldCode="DE" term="%22Ionic+liquids%22">Ionic liquids</searchLink><br /><searchLink fieldCode="DE" term="%22Electrochemical+analysis%22">Electrochemical analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Voltammetry%22">Voltammetry</searchLink><br /><searchLink fieldCode="DE" term="%22Square+waves%22">Square waves</searchLink><br /><searchLink fieldCode="DE" term="%22Electromagnetic+waves%22">Electromagnetic waves</searchLink><br /><searchLink fieldCode="DE" term="%22Chromatographic+analysis%22">Chromatographic analysis</searchLink>
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  Data: 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. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Data: <i>Copyright of Analytical Chemistry is the property of American Chemical Society and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1021/ac802406k
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      – Code: eng
        Text: English
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      – SubjectFull: Fluidic devices
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      – SubjectFull: Electrochemistry
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      – SubjectFull: Halides
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      – SubjectFull: Ionic liquids
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      – SubjectFull: Electromagnetic waves
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              Text: 2/15/2009
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