title: A simple fluorometric method for the determination of sulfur dioxide in ambient air with a passive sampler.
abstract: A simple and rapid fluorescence detection method was used for the determination of sulfur dioxide (SO(2)) in ambient air collected by a passive sampler. Gaseous SO(2) was absorbed as sulfite ions into an absorbing solution of triethanolamine (TEA) contained in an adsorbent sheet and reacted with N-(9-acridinyl)maleimide (NAM), which was used as a fluorescent reagent. TEA was also used as a buffer solution in this study. The calibration curve of SO(2) showed a linear correlation R(2)=0.992, and the relative standard deviation (RSD) was 2.4% for 50 ppb SO(2) with six repeated measurements. It was satisfactory to apply this method to determine the SO(2) level for simultaneous multipoint monitoring.
authors.affiliation: Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University, 1-1 Minami-Ohsawa, Hachioji, Tokyo 192-0397, Japan.
authors.forename: Wei
authors.initials: W
authors.lastname: Chang
authors.forename: Miwako
authors.initials: M
authors.lastname: Okamoto
authors.forename: Takashi
authors.initials: T
authors.lastname: Korenaga
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D004784:Environmental Monitoring / Q000295:instrumentation / Q000379:methods; D004983:Ethanolamines / Q000737:chemistry; D005470:Fluorometry; D008301:Maleimides / Q000737:chemistry; D013447:Sulfites / Q000737:chemistry; D013458:Sulfur Dioxide / Q000032:analysis*
chemical_list: D000393:Air Pollutants; D004983:Ethanolamines; D008301:Maleimides; D013447:Sulfites; D013458:Sulfur Dioxide; C080490:N-(9-acridinyl)maleimide; C009546:triethanolamine