Sartore Luciana, Barbaglio Marzia, Borgese Laura, Bontempi Elza
INSTM and Dipartimento di Ingegneria Meccanica e Industriale, Via Valotti 9, 25133 Brescia, Italy.
Sens Actuators B Chem. 2011 Jul 20;155(2):539-544. doi: 10.1016/j.snb.2011.01.003.
A flow type quartz crystal microbalance (QCM) chemical sensor was developed for monitoring of heavy metal ions in aqueous solutions (that is suitable for environmental monitoring). The sensor is based upon surface chelation of the metal ions at multifunctional polymer modified gold electrodes on 9 MHz AT-cut quartz resonators, functioning as a QCM. New processes have been developed which enable to obtain surface-modified gold electrodes with high heavy metal ions complexing ability. These polymer grafted QCM sensors can selectively adsorb heavy metal ions, such as copper lead chrome and cadmium, from solution over a wide range from 0.01 to 1000 ppm concentration by complexation with functional groups in the polymers. Cations typically present in natural water did not interfere with the detection of heavy metals. X-Ray Reflectivity (XRR) and Total Reflection X-ray Fluorescence (TXRF) were carried out to characterise the unmodified and modified gold surfaces as well as to verify the possibility to selectively bond and remove metal ions.
开发了一种流动型石英晶体微天平（QCM）化学传感器，用于监测水溶液中的重金属离子（适用于环境监测）。该传感器基于金属离子在9MHz AT切石英谐振器上的多功能聚合物修饰金电极上的表面螯合作用，作为QCM发挥作用。已经开发出新的工艺，能够获得具有高重金属离子络合能力的表面修饰金电极。这些聚合物接枝的QCM传感器可以通过与聚合物中的官能团络合，在0.01至1000ppm的宽浓度范围内从溶液中选择性吸附重金属离子，如铜、铅、铬和镉。天然水中通常存在的阳离子不会干扰重金属的检测。进行了X射线反射率（XRR）和全反射X射线荧光（TXRF）分析，以表征未修饰和修饰的金表面，并验证选择性结合和去除金属离子的可能性。
