Detection of volatile amines using a quartz crystal with gold electrodes
authors Gomes, MTSR; Verissimo, MIS; Oliveira, JABP
journal SENSORS AND ACTUATORS B-CHEMICAL
author keywords amine; quartz crystal microbalance; piezoelectric quartz crystal
keywords GAS-PHASE; TRIMETHYLAMINE; MICROBALANCE; ADSORPTION
abstract A quartz crystal with gold electrodes is used to detect and quantify volatile amines. The magnitude of the observed frequency decrease is highly dependent on the roughness of the surface of the gold electrodes and sensitivity can be increased by rubbing them with alumina. Water increases the observed signal, leading to important errors in the amine quantification. However, the presence of minor amounts of water is readily detected, as the plotted frequency signal shows a marked distortion. The effect of water on the interaction between amine and gold was studied by infrared spectroscopy. (C) 1999 Elsevier Science S.A. All rights reserved.
publisher ELSEVIER SCIENCE SA
issn 0925-4005
year published 1999
volume 57
issue 01-mar
beginning page 261
ending page 267
digital object identifier (doi) 10.1016/S0925-4005(99)00087-8
web of science category Chemistry, Analytical; Electrochemistry; Instruments & Instrumentation
subject category Chemistry; Electrochemistry; Instruments & Instrumentation
unique article identifier WOS:000083570600040
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journal impact factor 7.1
5 year journal impact factor 6.535
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