Abstract
An oscillating piezoelectric crown-ether-coated quartz crystal membrane detector with a computer interface for signal processing was prepared to detect polar organic vapours. The piezoelectric crown ether/quartz membrane detector exhibited high sensitivity with a frequency shift range of 10-340 Hz/(mg/l) for organic gases, a short response time (< 2.0 min), good selectivity and good reproducibility for reusage. Several coatings on quartz membrane crystals based on benzo-15-crown-5 and cryptand-22 were made for responses to organic amines, alcohols, ketones, halides, carboxylic acids and sulfides. Benzo-15-crown-5 functioned as a sensitive coating for alcohols, amines and organic sulfides whereas cryptand-22 was sensitive to amines and carboxylic acids. Steric effects and isomer effects on frequency shifts of the quartz crystal detector based on benzo-15-crown-5 for alcohols and amines were also investigated.
Original language | English |
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Pages (from-to) | 129-137 |
Number of pages | 9 |
Journal | Analytica Chimica Acta |
Volume | 306 |
Issue number | 1 |
DOIs | |
Publication status | Published - 1995 Apr 28 |
Keywords
- Crown ethers
- Organic vapour detector
- Piezoelectric sensors
ASJC Scopus subject areas
- Analytical Chemistry
- Biochemistry
- Environmental Chemistry
- Spectroscopy