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Reference type: Journal
Authors: Stanley S, Percival CJ, Auer M, Braithwaite A, Newton MI, McHale G, Hayes W
Article Title: Detection of polycyclic aromatic hydrocarbons using quartz crystal microbalances.
Publication date: 2003
Journal: Analytical Chemistry
Volume: 75
Issue: (7)
Page numbers: 1573-1577.
DOI: 10.1021/ac0257546

Abstract: A chemically coated piezoelectric sensor has been developed for the determination of PAHs in the liquid phase. An organic monolayer attached to the surface of a gold electrode of a quartz crystal microbalance (QCM) via a covalent thiol-gold link complete with an ionically bound recognition element has been produced. This study has employed the PAH derivative 9- anthracene carboxylic acid which, once bound to the alkane thiol, functions as the recognition element. Binding of anthracene via pi-pi interaction has been observed as a frequency shift in the QCM with a detectability of the target analyte of 2 ppb and a response range of 0-50 ppb. The relative response of the sensor altered for different PAHs despite pi-pi interaction being the sole communication between recognition element and analyte. It is envisaged that such a sensor could be employed in the identification of key marker compounds and, as such, give an indication of total PAH flux in the environment

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