Detection of sulfur dioxide using a piezoelectric quartz crystal microbalance

Journal Article · Mon Sep 01 00:00:00 EDT 1997 · Analytical Letters

DOI:https://doi.org/10.1080/00032719708001730· OSTI ID:569785

Guimaraes, O M ^[1]

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1. Instituto de Quimica de Sao Carlos (Brazil)

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 SO{sub 2}. 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.

• Sponsoring Organization: USDOE
• OSTI ID: 569785
• Journal Information: Analytical Letters, Vol. 30, Issue 12; Other Information: PBD: Sep 1997
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
44 INSTRUMENTATION
INCLUDING NUCLEAR AND PARTICLE DETECTORS
SULFUR DIOXIDE
MONITORING
PIEZOELECTRICITY
COATINGS
DETECTION
ORGANIC NITROGEN COMPOUNDS
MEASURING INSTRUMENTS
AIR POLLUTION
COMBUSTION PRODUCTS