title: [Determination of water soluble organic acids in PM2.5 of atmosphere in Beijing City].
abstract: Ten water soluble organic acids in PM2.5 of atmosphere in Beijing were determined by capillary electrophoresis, including low molecular weight dicarboxylic acids, aldehyde acids, ketoacids and methanesulfonic acid. The quantified detection limits ranged from 110 to 280 microg/L (extract). The precise of peak area was between 1.7% and 6.0%, and the correlation coefficients of standard curve were 0.995-0.999. The average total concentrations of the ten organic acids in summer, fall and winter were 721 ng/m3, 362 ng/m3 and 325 ng/m3, respectively, which were comparable with some foreign big cities. Oxalic acid was the most abundant species. By exploring seasonal variations of the acids, their source characteristics were simply discussed.
authors.affiliation: State Key Joint Laboratory of Environment Simulation and Pollution Control, College of Environmental Sciences, Peking University, Beijing 100871, China.
authors.forename: Xiao-feng
authors.initials: XF
authors.lastname: Huang
authors.forename: Min
authors.initials: M
authors.lastname: Hu
authors.forename: Ling-yan
authors.initials: LY
authors.lastname: He
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D002681:China; D003998:Dicarboxylic Acids / Q000032:analysis; D019075:Electrophoresis, Capillary; D007651:Keto Acids / Q000032:analysis; D008698:Mesylates / Q000032:analysis; D009930:Organic Chemicals / Q000032:analysis*; D010316:Particle Size; D012621:Seasons; D012995:Solubility
chemical_list: D000393:Air Pollutants; D003998:Dicarboxylic Acids; D007651:Keto Acids; D008698:Mesylates; D009930:Organic Chemicals; C045880:methanesulfonic acid