Journal of Food, Agriculture and Environment
Vol 11,
Issue 3&4,2013
Online ISSN: 1459-0263
Print ISSN: 1459-0255
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Detection of volatile organic compounds using modified quartz crystal microbalance
Author(s):
Juncai Hou 1,
Hidenobu Aizawa 2, Lixia Hou 1, Zenglin Zhang 1, Kangquan Guo 1*, Takaaki Satake 3Recieved Date: 2013-07-03, Accepted Date: 2013-10-16
Abstract:To detect volatile organic compounds (VOCs) at ppm level, quartz crystal microbalance (QCM) gas sensors were developed through drop-coating 1,2-dioleoyl-sn-glycero-3-[phospho-L-serine] (DOPS), galactosylceramide (cerebroside, GC), ethyl cellulose (EC) and cellulose acetate (CA) on the electrodes of QCM. The selectivity and sensitivity of these sensors were studied when exposed to isobutyl alcohol, ethyl acetate and ethylene with increasing concentrations from 5 to 25 ppm. The results showed that the frequency shifts of all sensors were linear to the concentrations of all VOCs in the range of 5-25 ppm (R2 > 0.975) except for EC exposed to ethyl acetate, and GC exposed to isobutyl alcohol. The sensitivity of CA coated sensor to three VOCs was similar and the highest in all sensors, with the value reaching to above 4.5 Hz/ppm. This research may be applied to the development of sensor elements for non-destruction detection of ripeness stage (RS) of fruits.
Keywords:Volatile organic compounds (VOCs),
quartz crystal microbalance (QCM), drop-coating, detection, isobutyl alcohol, ethyl acetate, ethyleneJournal: Journal of Food, Agriculture and Environment
Year: 2013
Volume: 11
Issue: 3&4
Category: Environment
Pages: 2730-2733
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