title: [Compositions of organic acids in PM10 emission sources in Xiamen urban atmosphere].
abstract: The possible organic acid emission sources in PM10 in Xiamen urban atmosphere such as cooking, biomass burning, vehicle exhaust and soil/dust were obtained using a re-suspension test chamber. A total of 15 organic acids including dicarboxylic acids, fatty acids and aromatic acids were determined using GC/MS after derivatization with BF3/n-butanol. The results showed that the highest total concentration of 15 organic acids (53%) was found in cooking emission and the average concentration of the sum of linoleic acid and oleic acid was 24% +/- 14%. However, oxalic acid was the most abundant species followed by phthalic acid in gasoline vehicle exhaust. The ratios of adipic to azelaic acid in gasoline combustion emissions were significantly higher than those in other emission sources, which can be used to qualitatively differentiate anthropogenic and biological source of dicarboxylic acids in atmospheric samples. The ratios of malonic to succinic acid in source emissions (except gasoline generator emissions) were lower (0.07-0.44) than ambient PM10 samples (0.61-3.93), which can be used to qualitatively differentiate the primary source and the secondary source of dicarboxylic acids in urban PM10.
authors.affiliation: State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361005, China. yangbingyu0505@126.com
authors.forename: Bing-Yu
authors.initials: BY
authors.lastname: Yang
authors.forename: Xing-Xing
authors.initials: XX
authors.lastname: Huang
authors.forename: An
authors.initials: A
authors.lastname: Zheng
authors.forename: Bi-Lian
authors.initials: BL
authors.lastname: Liu
authors.forename: Shui-Ping
authors.initials: SP
authors.lastname: Wu
mesh_terms: D000143:Acids / Q000032:analysis; D000393:Air Pollutants / Q000032:analysis*; D001272:Atmosphere / Q000032:analysis*; D002681:China; D002947:Cities; D003998:Dicarboxylic Acids / Q000032:analysis; D004784:Environmental Monitoring; D005227:Fatty Acids / Q000032:analysis; D008401:Gas Chromatography-Mass Spectrometry; D009930:Organic Chemicals / Q000032:analysis*; D019815:Oxalic Acid / Q000032:analysis; D010316:Particle Size; D052638:Particulate Matter / Q000737:chemistry*
chemical_list: D000143:Acids; D000393:Air Pollutants; D003998:Dicarboxylic Acids; D005227:Fatty Acids; D009930:Organic Chemicals; D052638:Particulate Matter; D019815:Oxalic Acid