Detection of some volatile organic compounds with chitosan-coated quartz crystal microbalance

Abstract

A quartz crystal microbalance (QCM) electrode coated with Chitosan (Cs) film was used as a sensor for some volatile organic compounds (VOCs) such as aliphatic amines and alcohols. A homogeneous smooth thin films of Cs coating on the QCM electrode was prepared by drop casting method. The frequency shifts (Δf) of the QCM, due to adsorption of the VOCs under investigation, onto the Cs film were measured and were related to the analytes concentrations. Calibration curves were obtained with linear relationships between the Δf (Hz) and the analyte concentrations (mg L-1). The sensor showed good sensitivity, reproducibility, and reversibility. The influence of different temperatures on the vapor adsorption, of the VOCs onto the Cs film, was studied. © 2014 Taylor & Francis.