title: Simultaneous determination of atmospheric sulfur and nitrogen oxides using a battery-operated portable filter pack sampler.
abstract: We developed a method to analyze atmospheric SO(x) (particulate SO(4)(2-)+ gaseous SO(2)) and NO(x) (NO + NO(2)) simultaneously using a battery-operated portable filter pack sampler. NO(x) determination using a filter pack method is new. SO(x) and NO(x) were collected on a Na(2)CO(3) filter and PTIO (2-phenyl-4,4,5,5-tetramethylimidazoline-3-oxide-1-oxyl) + TEA (triethanolamine) filters (6 piled sheets), respectively. Aqueous solutions were then used to extract pollutants trapped by the filters and the resulting extracts were pre-cleaned (e.g. elimination of PTIO) and analyzed for sulfate and nitrite by ion chromatography. Recoveries of SO(2) and NO(x) from standard pollutant gases and consistency of the field data with those from other instrumental methods were examined to evaluate our method. SO(x) and NO(x) could be analyzed accurately with determination limits of 0.2 ppbv and 1.0 ppbv (as daily average concentrations), respectively. The sampler can determine SO(x) and NO(x) concentrations at mountainous or remote sites without needing an electric power supply.
authors.affiliation: Graduate School of Science and Technology, Chiba University, 648 Matsudo, Chiba, 271-8510, Japan.
authors.forename: Mirai
authors.initials: M
authors.lastname: Watanabe
authors.forename: Takejiro
authors.initials: T
authors.lastname: Takamatsu
authors.forename: Masami K
authors.initials: MK
authors.lastname: Koshikawa
authors.forename: Kazunori
authors.initials: K
authors.lastname: Sakamoto
authors.forename: Kazuyuki
authors.initials: K
authors.lastname: Inubushi
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D002254:Carbonates; D002482:Cellulose; D003497:Cyclic N-Oxides; D004784:Environmental Monitoring / Q000295:instrumentation* / Q000379:methods; D004983:Ethanolamines; D005374:Filtration; D006813:Humidity; D007093:Imidazoles; D009589:Nitrogen Oxides / Q000032:analysis*; D011791:Quartz; D015203:Reproducibility of Results; D013461:Sulfur Oxides / Q000032:analysis*
chemical_list: D000393:Air Pollutants; D002254:Carbonates; D003497:Cyclic N-Oxides; D004983:Ethanolamines; D007093:Imidazoles; D009589:Nitrogen Oxides; D013461:Sulfur Oxides; D011791:Quartz; C079391:2-phenyl-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide; C005686:sodium carbonate; D002482:Cellulose; C009546:triethanolamine