Intercomparison of Thermal-Optical Methods for the Determination of   Organic and Elemental Carbon: Influences of Aerosol Composition and   Implications

doi:10.1021/es202649g

CORC > 北京大学 > 环境科学与工程学院

	Intercomparison of Thermal-Optical Methods for the Determination of Organic and Elemental Carbon: Influences of Aerosol Composition and Implications
	Cheng, Yuan ; Duan, Feng-kui ; He, Ke-bin ; Zheng, Mei ; Du, Zhen-yu ; Ma, Yong-liang ; Tan, Ji-hua
刊名	environmental science technology
	2011
关键词	BIOMASS BURNING CONTRIBUTION SAMPLING ARTIFACTS LIGHT-ABSORPTION BEIJING AEROSOL BLACK CARBON TEMPERATURE IDENTIFICATION REFLECTANCE PROTOCOL IMPROVE
DOI	10.1021/es202649g
英文摘要	An intercomparison of organic carbon (OC) and elemental carbon (EC) measurements was conducted based on ambient aerosol samples collected during four seasons in Beijing, China. Dependence of OC and EC values on the temperature protocol and the charring correction method is presented and influences of aerosol composition are investigated. EC was found to decrease with the peak inert mode temperature (T-peak) such that EC determined by the IMPROVE (the Interagency Monitoring of Protected Visual Environments)-A protocol (T-peak was 580 degrees C) was 2.85 +/- 1.31 and 3.83 +/- 2.58 times that measured by an alternative protocol with a T-peak of 850 degrees C when using the transmittance and reflectance correction, respectively. It was also found that reflectance correction tends to classify more carbon as EC compared with transmittance; results from the IMPROVE-A protocol showed that the ratio of EC defined by reflectance correction (ECR) to that based on transmittance (ECT) averaged 1.50 +/- 0.42. Moreover, it was demonstrated that emissions from biomass burning would increase the discrepancy between EC values determined by different temperature protocols. On the other hand, the discrepancy between ECR and ECT was strongly associated with secondary organic aerosol (SOA) which was shown to be an important source of the organics that pyrolyze during the inert mode of thermal optical analysis.; Engineering, Environmental; Environmental Sciences; SCI(E); EI; 0; ARTICLE; 23; 10117-10123; 45
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/394163]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	Cheng, Yuan,Duan, Feng-kui,He, Ke-bin,et al. Intercomparison of Thermal-Optical Methods for the Determination of Organic and Elemental Carbon: Influences of Aerosol Composition and Implications[J]. environmental science technology,2011.
APA	Cheng, Yuan.,Duan, Feng-kui.,He, Ke-bin.,Zheng, Mei.,Du, Zhen-yu.,...&Tan, Ji-hua.(2011).Intercomparison of Thermal-Optical Methods for the Determination of Organic and Elemental Carbon: Influences of Aerosol Composition and Implications.environmental science technology.
MLA	Cheng, Yuan,et al."Intercomparison of Thermal-Optical Methods for the Determination of Organic and Elemental Carbon: Influences of Aerosol Composition and Implications".environmental science technology (2011).