<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Guo, S.</style></author><author><style face="normal" font="default" size="100%">Hu, M.</style></author><author><style face="normal" font="default" size="100%">Guo, Q. F.</style></author><author><style face="normal" font="default" size="100%">Shang, D. J.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Comparison of Secondary Organic Aerosol Estimation Methods</style></title><secondary-title><style face="normal" font="default" size="100%">Acta Chimica SinicaActa Chimica SinicaActa Chimica Sinica</style></secondary-title><alt-title><style face="normal" font="default" size="100%">Acta Chim Sinica</style></alt-title><short-title><style face="normal" font="default" size="100%">Acta Chim SinicaActa Chim Sinica</style></short-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">air-pollution sources</style></keyword><keyword><style  face="normal" font="default" size="100%">atmosphere</style></keyword><keyword><style  face="normal" font="default" size="100%">Carbon</style></keyword><keyword><style  face="normal" font="default" size="100%">chemical-characterization</style></keyword><keyword><style  face="normal" font="default" size="100%">chinese cooking</style></keyword><keyword><style  face="normal" font="default" size="100%">comparison study</style></keyword><keyword><style  face="normal" font="default" size="100%">emissions</style></keyword><keyword><style  face="normal" font="default" size="100%">estimation method</style></keyword><keyword><style  face="normal" font="default" size="100%">fireplace combustion</style></keyword><keyword><style  face="normal" font="default" size="100%">matter</style></keyword><keyword><style  face="normal" font="default" size="100%">method applicability</style></keyword><keyword><style  face="normal" font="default" size="100%">particles</style></keyword><keyword><style  face="normal" font="default" size="100%">secondary organic aerosol</style></keyword><keyword><style  face="normal" font="default" size="100%">secondary organic carbon</style></keyword><keyword><style  face="normal" font="default" size="100%">summer</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2014</style></year><pub-dates><date><style  face="normal" font="default" size="100%">Jun 15</style></date></pub-dates></dates><number><style face="normal" font="default" size="100%">6</style></number><volume><style face="normal" font="default" size="100%">72</style></volume><pages><style face="normal" font="default" size="100%">658-666</style></pages><isbn><style face="normal" font="default" size="100%">0567-7351</style></isbn><language><style face="normal" font="default" size="100%">Chinese</style></language><abstract><style face="normal" font="default" size="100%">To investigate the secondary organic aerosol (SOA) formation in Beijing, fine particle (PM2.5) samples were collected at an urban site (Peking University, PKU) and a rural site (Yufa) during CAREBEITING 2008 summer intensive field campaign. Several approaches were used to estimate SOA concentrations, including tracer-yield method, non-primary organic carbon method (receptor model, Chemical Mass Balance model), non-biomass burning water soluble organic carbon (WSOC) method and EC tracer OC/EC ratio method. To develop non-biomass burning WSOC method, simulation of typical Chinese biomass burning was conducted to obtain the important parameters. The average WSOC/OC ratio in Chinese biomass burning is 0.48 +/- 0.04. This ratio can be used in non-biomass burning WSOC method to estimate SOC of China. The results from different methods all indicated secondary formation has become major contributor to organic aerosols in Beijing, accounting for 50% or more of the total OC. A closure study was made by combination of CMB model and tracer-yield method. Five primary sources, including vegetative detritus, biomass burning, coal burning, gasoline engines and diesel engines, and four secondary organic aerosols derived from isoprene, alpha-pinene, beta-caryophyllene and toluene were apportioned. To the current knowledge, about 20%similar to 27% of the OC sources still remain unknown. Applicability of these SOC methods in China was tested by comparing the different methods. Tracer-yield method, CMB model and EC tracer OC/EC ratio method can be used to estimate SOC in China. However, non-biomass burning WSOC method can only be used to estimate water-soluble SOC. Uncertainty analysis was conducted to help researchers to determine the proper method to estimate SOC in China. Tracer-yield method underestimates total SOC, because it can only estimate SOCs from several precursors. Similarly, non-biomass burning WSOC method also underestimate SOC. Non-primary OC method overestimates SOC due to unapportioned primary OC, especially in urban area where the particle sources are complicated. The uncertainty of EC-tracer OC/EC ratio method is mainly from the primary OC/EC ratio. The largest overestimation and underestimation of single point value can be 54% and 64%.</style></abstract><accession-num><style face="normal" font="default" size="100%">WOS:000339414100003</style></accession-num><notes><style face="normal" font="default" size="100%">Al8ubTimes Cited:4Cited References Count:44</style></notes><auth-address><style face="normal" font="default" size="100%">Peking Univ, Coll Environm Sci &amp; Engn, State Key Joint Lab Environm Simulat &amp; Pollut Con, Beijing 100871, Peoples R China</style></auth-address></record></records></xml>