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Issue 4, 2012
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Determination of lead in water by combining precolumn adsorption and fluorimetric detection in a microfluidic device

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Abstract

A microfluidic device equipped for in situ fluorescence detection and combined with an off-line microcolumn adsorption is proposed for the determination of lead in natural water. The precolumn adsorption is based on a microcapillary filled with aminopropyl silica. An efficient Pb2+ adsorption on aminopropyl silica was proved by Langmuir isotherm adsorption experiments. The maximum adsorption capacity was found to be 5.7 × 10−4 mol g−1. By using this solid phase extraction procedure (SPE), a 100-fold specific lead concentration was obtained. The concentrated solution was then run into a microfluidic device equipped for fluorescence detection and the complete procedure allows lead determination with a detection limit of 2 μg L−1. Furthermore, it was found that these measurements are not disrupted by the addition of a large excess of other interfering cations.

Graphical abstract: Determination of lead in water by combining precolumn adsorption and fluorimetric detection in a microfluidic device

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Article information


Submitted
13 Oct 2011
Accepted
19 Jan 2012
First published
09 Mar 2012

Anal. Methods, 2012,4, 989-994
Article type
Paper

Determination of lead in water by combining precolumn adsorption and fluorimetric detection in a microfluidic device

T. Wu, L. Zhao, D. Faye, J. Lefevre, J. Delaire and I. Leray, Anal. Methods, 2012, 4, 989
DOI: 10.1039/C2AY05677A

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