Polymer-coated quartz crystal microbalance chemical sensor for heavy cations in water.
A flow type quartz crystal microbalance (QCM) (bio)chemical sensor was developed for the real time determination of heavy metal ions that is suitable for environmental monitoring. A new process has been developed which enables to obtain surface-modified gold electrodes with high heavy metal ions complexing ability. The sensing performances of the piezoelectric sensor used in a flow-through setup were investigated by monitoring the frequency variation induced by the presence of heavy metal ions, such as copper and lead, as model ions, in aqueous media. X-Ray Reflectivity (XRR) and Atomic Force Microscopy (AFM) were carried out to characterize the unmodified and modified gold surfaces.
Sartore
L
L
Department of Chemistry and Physics for Engineering and Materials, University of Brescia, Brescia 25133, Italy.
Barbaglio
M
M
Penco
M
M
Bergese
P
P
Bontempi
E
E
Colombi
P
P
Depero
L E
LE