Km. Wang et al., PIEZOELECTRIC CRYSTAL SENSOR WITH A PLASTICIZED POLY(VINYL CHLORIDE) COATING FOR DETERMINATION OF TRACE AMOUNTS OF ETHANOL VAPOR, Analyst, 121(2), 1996, pp. 259-262
A new type of piezoelectric sensor with a coating supported by adding
the active material ETH6022 (N-acetyl-N-dodecyl-4-trifluoroacetylanili
ne) to a plasticized PVC polymer matrix (PCS-PVC) was successfully pre
pared for detecting trace amounts of ethanol vapour, Compared with the
traditional piezoelectric crystal sensor (PCS) using a single active
material coating, the useful lifetime of the new sensor is extended st
rikingly from several days to more than 2 months, which is comparable
to that of an ion-selective electrode, The reproducibility of PCS-PVC
is also improved. The new coating method for the sensor was also appli
ed to extending the useful lifetime of other classical gas-sensitive P
CSs.