Detection of Sulfur Dioxide Using a Piezoelectric Quartz Crystal Microbalance
作者:
OrlineyM. Guimarães,
JoséF. Andrade,
DeniseP. Ruys,
期刊:
Analytical Letters
(Taylor Available online 1997)
卷期:
Volume 30,
issue 12
页码: 2159-2174
ISSN:0003-2719
年代: 1997
DOI:10.1080/00032719708001730
出版商: Taylor & Francis Group
关键词: Sulfur dioxide;piezoelectric sensor;quartz crystal (QCM)
数据来源: Taylor
摘要:
Sulfur dioxide was detected and determined in air by a piezoelectric quartz crystal sensor coated with 4-aminoantipyrine 1-hydroxyetil-2-heptadecenyl imidazol (amine 220) solution (1:1 v/v in chloroform). The analytical response curve is linear over the concentration range from 0.70 to 5.0 ppm of SO2. Good linearities (r = 0.9990, 0.9995 and 0.9968) and sensitivities (18.0, 33.4 and 50.7 Hz/ppm) were found, respectively for exposure times of 30, 60 and 90 seconds. The sensor can be used for more than six months without loss in sensitivity and presented good reversibility and reproducibility. Among some possible interferents tested, only nitrogen dioxide and moisture caused major frequency changes.
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