Without internal affiliation

  • Author: Lafleur, Josiane P.


  • Author: Rackov, Andrien A.

    McGill University

  • Author: McAuley, Scott

    McGill University

  • Author: Salin, Eric D.

    McGill University

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Great variations in pollutant concentrations are observed in the environment and pre-concentration is often required to detect trace contaminants in water samples. This paper presents a novel solid phase-extraction device integrated onto a centrifugal microfluidic platform for rapid on-site pre-concentration and screening of organic contaminants in aqueous samples. In-column fluorescence and absorbance measurements are obtained directly from an analyte trapped on the top of a solid phase extraction microcolumn. Results are presented for the representative fluorophore fluorescein and the polycyclic aromatic hydrocarbon anthracene. An absolute detection limit of 20 ng was obtained for anthracene using a simple light emitting diode for fluorescence excitation. One of the main advantages of this device is that only a simple motor is needed to induce liquid flow, making simultaneous on-site extraction and measurement of multiple samples easy while minimizing sample losses and contamination.
Keyword: Fluorescence,Centrifugal microfluidics,PAH,Solid phase extraction,Absorbance,In situ detection
Original languageEnglish
Issue number1-2
Pages (from-to)722
StatePublished - 2010
CitationsWeb of Science® Times Cited: 22
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ID: 6443064