期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 170, 期 -, 页码 104-108出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2011.02.032
关键词
Detection; Formaldehyde; Fluorescence; Sol-gel
A hand-held formaldehyde (HCHO) gas detector has been developed. This fluorescence-based system uses a standard microscope glass slide both as a transducer and a sensor. The detection of gaseous formaldehyde is performed using the well-known Sawicki reaction with Fluoral-P, a reagent present in the nanoporous thin film which allows a selective reaction with formaldehyde. The nanoporous film of hybrid organic-inorganic polymer, prepared via the sol-gel method, is coated on the microscope slide by spin-coating, enabling reproducible coatings of various shapes and thicknesses. Experiments were carried out in the laboratory to calibrate the instrument, with the objective to perform measurements indoor and outdoor. The real-time monitoring allows to detect formaldehyde pollution peaks. (C) 2011 Elsevier B.V. All rights reserved.
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