2010•Journal of Analytical ScienceRequires access

Characterization of Organic Carbon,Elemental Carbon and Water-Soluble Organic Carbon in PM_(2.5) of Guangzhou City

Shiming Li

Abstract

Daily PM2.5 samples were collected at Sun Yat-sen University in Guangzhou city,lasting 1 year.The loaded samples were weighted for PM2.5 mass concentration,and analyzed for organic carbon(OC),elemental carbon(EC),and water-soluble organic carbon(WSOC).Monthly and seasonal distribution characters of PM2.5 and OC,EC,WSOC were discussed and the results obtained in this study were compared with others,showing severe carbonaceous pollution in Guangzhou.OC-EC relationship was good,indicating most of sources of OC and EC was the same.Secondary organic carbons(SOC) were estimated based on OC/EC ratio.SOC contributed average 1/3 to OC in PM2.5.SOC and SOC/OC ratio seasonal distributions were investigated,and the results clemonstrated that SOC formed more in summer than in winter.

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Key concepts: Total organic carbon, Chemistry, Environmental chemistry, Carbon fibers, Pollution, Composite material, Composite number, Biology