Detection of polycyclic aromatic hydrocarbons using quartz crystal microbalances.
Detection of polycyclic aromatic hydrocarbons using quartz crystal microbalances.
复制标题
DOI：
10.1021/ac0257546
复制
发表时间：
2003-02
影响因子：
7.4
通讯作者：
S. Stanley;C. Percival;Manfred Auer;A. Braithwaite;M. Newton;G. McHale;W. Hayes
中科院分区：
文献类型：
--
作者：
S. Stanley;C. Percival;Manfred Auer;A. Braithwaite;M. Newton;G. McHale;W. Hayes
研制了一种化学涂层压电传感器，用于液相中多环芳烃的测定。制备了一种通过共价键连接到石英晶体微天平（QCM）金电极表面的有机单分子膜，该膜含有离子键合的识别元件。本研究采用PAH衍生物9-蒽羧酸，一旦结合到烷硫醇，作为识别元素的功能。通过π-π相互作用观察到蒽的结合为QCM中的频移，目标分析物的可检测性为2 ppb，响应范围为0-50 ppb。不同的多环芳烃的传感器的相对响应改变，尽管π-π相互作用是唯一的识别元素和分析物之间的通信。据设想，这种传感器可以用于识别关键的标记化合物，并因此，给出了环境中的总PAH通量的指示。
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.