IEECAS OpenIR  > 粉尘与环境研究室
Quantification of carbonate carbon in aerosol filter samples using a modified thermal/optical carbon analyzer (M-TOCA)
Ho, SSH (Ho, Steven Sai Hang)[1,2]; Ho, KF (Ho, Kin Fai)[1,3]; Liu, SX (Liu, Suixin)[1]; Liu, WD (Liu, Wandong)[4]; Lee, SC (Lee, Shun Cheng)[4]; Fung, KK (Fung, Kochy K.)[5]; Cao, JJ (Cao, Junji)[1]; Zhang, RJ (Zhang, Renjian)[6]; Huang, Y (Huang, Yu)[4]; Feng, NSY (Feng, Natele Siu Yau)[7]; Cheng, Y (Cheng, Yan)[8]
2012-12-31
Source PublicationANALYTICAL METHODS
Volume4Issue:8Pages:2578-2584
Subtype期刊论文
Abstract

Measurement of carbon dioxide (CO2) gas evolved from acidification is a method to quantify carbonate carbon (CC) in aerosols collected on quartz fiber-filters. This paper describes the installation of an add-on device in a DRI Model 2001 Thermal Optical reflectance (TOR)/Thermal Optical Transmittance (TOT) Carbon Analyzer (M-TOCA) to facilitate a direct CC measurement. In each run, a maximum of 20 filter punches (each of 0.5 cm(2)) were acidified with 1 mL of 20% v/v phosphoric (V) acid in a vial under a 100% helium gas environment. The CO2 evolved was reduced to methane (CH4) and detected by a flame ionization detector (FID). The optimum reaction kinetics were obtained under an operational temperature of 40 degrees C and ultrasonic agitation. Method precisions were +/- 3.5% on average for carbonate standards ranging from 3.0 to 60.0 mu g and +/- 3.8% on average for ambient samples in masses ranging from 0.30 to 56.0 mu g respectively. Method accuracy was on average 91.9%, ranging from 81.4 to 102.1%. Minimum detection limit (MDL) of the M-TOCA method was 0.048 mu g cm(-2), corresponding to an ambient concentration of 0.098 mu g m(-3) for a sampled volume of air of 7.2 m(3). The MDL is >22 times lower than the value obtained using the novel method with a regular TOCA. Comparison studies on standards and ambient samples have demonstrated that the two methods do not yield systematic differences in concentrations of the carbonate. The lower MDL value provided by the M-TOCA allows a simple, precise and accurate measurement for ambient samples having a low CC concentration.

KeywordSize-differentiated Aerosols Chemical Composition Scanning Electron Microscopy
DOI10.1039/c2ay05942h
Indexed BySCIE ; EI
Language英语
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/10093
Collection粉尘与环境研究室
Corresponding AuthorHo, SSH (Ho, Steven Sai Hang)[1,2]
Affiliation1.SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences,Xi’an, 710075, China;
2.Division of Atmospheric Sciences, Desert Research Institute, Reno, NV89512, USA;
3.School of Public Health and Primary Care, The Chinese University ofHong Kong, Hong Kong, China;
4.Department of Civil and Structural Engineering, Research Center forEnvironmental Technology and Management, The Hong KongPolytechnic University, Hung Hom, Hong Kong, China;
5.Atmoslytic, Inc., 23917 Craftsman Road, Calabasas, CA 91302, USA;
6.Key Laboratory of Regional Climate-Environment Research forTemperate East Asia, Institute of Atmospheric Physics, ChineseAcademy of Sciences, START Regional Center for Temperate East Asia,Beijing 100029, China;
7.Hong Kong Premium Services and Research Laboratory, Hung Hom,Hong Kong, China;
8.Department of Environmental Science and Technology, School of HumanSettlements and Civil Engineering, Xi’an Jiaotong University, No. 28Xianning West Road, Xi’an, Shaanxi, 710049, China
Recommended Citation
GB/T 7714
Ho, SSH ,Ho, KF ,Liu, SX ,et al. Quantification of carbonate carbon in aerosol filter samples using a modified thermal/optical carbon analyzer (M-TOCA)[J]. ANALYTICAL METHODS,2012,4(8):2578-2584.
APA Ho, SSH .,Ho, KF .,Liu, SX .,Liu, WD .,Lee, SC .,...&Cheng, Y .(2012).Quantification of carbonate carbon in aerosol filter samples using a modified thermal/optical carbon analyzer (M-TOCA).ANALYTICAL METHODS,4(8),2578-2584.
MLA Ho, SSH ,et al."Quantification of carbonate carbon in aerosol filter samples using a modified thermal/optical carbon analyzer (M-TOCA)".ANALYTICAL METHODS 4.8(2012):2578-2584.
Files in This Item:
File Name/Size DocType Version Access License
Quantification of ca(351KB)期刊论文作者接受稿开放获取CC BY-NC-SAApplication Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Ho, SSH (Ho, Steven Sai Hang)[1,2]]'s Articles
[Ho, KF (Ho, Kin Fai)[1,3]]'s Articles
[Liu, SX (Liu, Suixin)[1]]'s Articles
Baidu academic
Similar articles in Baidu academic
[Ho, SSH (Ho, Steven Sai Hang)[1,2]]'s Articles
[Ho, KF (Ho, Kin Fai)[1,3]]'s Articles
[Liu, SX (Liu, Suixin)[1]]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Ho, SSH (Ho, Steven Sai Hang)[1,2]]'s Articles
[Ho, KF (Ho, Kin Fai)[1,3]]'s Articles
[Liu, SX (Liu, Suixin)[1]]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.