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Talanta

Title:		Alcohol vapours sensor based on thin polyaniline salt film and quartz crystal microbalance
Author(s):		Ayad MM; Torad NL;
Address:		"Department of Chemistry, University of Tanta, Tanta, Egypt. mayad12000@yahoo.com"
Journal Title:		Talanta
Year:		2009
Volume:		20090205
Issue:		4-May
Page Number:		1280 - 1285
DOI:		10.1016/j.talanta.2009.01.053
ISSN/ISBN:		1873-3573 (Electronic) 0039-9140 (Linking)
Abstract:		"A sensor based on the quartz crystal microbalance (QCM) technique was developed for detection of a number of primary aliphatic alcohols such as ethanol, methanol, 1-propanol, and 2-propanol vapours. Detection was based on a sensitive and a thin film of polyaniline, emeraldine salt (ES), coated the QCM electrode. The frequency shifts (Delta f) of the QCM were increased due to the vapour absorption into the ES film. The values of Delta f were found to be linearly correlated with the concentrations of alcohols vapour in mg L(-1). The changes in frequency are due to the hydrophilic character of the ES and the electrostatic interaction as well as the type of the alcohol. The sensor shows a good reproducibility and reversibility. The diffusion and diffusion coefficient (D) of different alcohols vapour were determined. It was found that the sensor follows Fickian kinetics"
Keywords:		"Alcohols/*analysis Aniline Compounds Electrochemical Techniques Membranes, Artificial Micro-Electrical-Mechanical Systems/instrumentation/*methods Reproducibility of Results Static Electricity Volatile Organic Compounds/*analysis;"
Notes:		"MedlineAyad, Mohamad M Torad, Nagy L eng Evaluation Study Netherlands 2009/04/14 Talanta. 2009 Jun 15; 78(4-5):1280-5. doi: 10.1016/j.talanta.2009.01.053. Epub 2009 Feb 5"