A prototype quartz crystal microbalance-based transducer is proposed for in-situ measurements of very-low chloroform activity. The sensing element consists of a syndiotactic polystyrene thin film sprayed on the piezoelectric quartz electrode of the microbalance. Chloroform adsorption and desorption in the film give rise to a mass variation implying a related variation in the resonance frequency of the crystal. Static and dynamic metrological characterizations of the sensor prototype were carried out at varying chloroform activity and temperature levels. Satisfactory sensitivity, repeatability, and dynamic hysteresis were highlighted.
A chloroform transducer based sPS-de-coated crystal microbalance / Arpaia, Pasquale; G., Guerra; Mensitieri, Giuseppe; SCHIANO LO MORIELLO, Rosario. - STAMPA. - 2:(2002), pp. 1093-1097. (Intervento presentato al convegno IMTC/02 tenutosi a Anchorage, USA nel Maggio 2002).
A chloroform transducer based sPS-de-coated crystal microbalance
ARPAIA, PASQUALE;MENSITIERI, GIUSEPPE;SCHIANO LO MORIELLO, ROSARIO
2002
Abstract
A prototype quartz crystal microbalance-based transducer is proposed for in-situ measurements of very-low chloroform activity. The sensing element consists of a syndiotactic polystyrene thin film sprayed on the piezoelectric quartz electrode of the microbalance. Chloroform adsorption and desorption in the film give rise to a mass variation implying a related variation in the resonance frequency of the crystal. Static and dynamic metrological characterizations of the sensor prototype were carried out at varying chloroform activity and temperature levels. Satisfactory sensitivity, repeatability, and dynamic hysteresis were highlighted.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
