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Positive sampling artifacts of organic carbon fractions for fine particles and nanoparticles in a tunnel environment
Zhu, CS (Zhu, Chong-Shu)[1,2]; Tsai, CJ (Tsai, Chuen-Jinn)[1]; Chen, SC (Chen, Sheng-Chieh)[1]; Cao, JJ (Cao, Jun-Ji)[2,3]; Roam, GD (Roam, Gwo-Dong)[4]
2012-07-31
Source PublicationATMOSPHERIC ENVIRONMENT
Volume54Pages:225-230
Subtype期刊论文
Abstract

The positive artifacts in particulate organic carbon fractions for fine particles (PM2.5) and nanoparticles (PM0.1) were characterized in a tunnel environment by using the QBQ (a quartz filter behind a quartz filter) method. The OC concentrations of the backup quartz filters ranged from 3.56 to 11.38 mu g m(-3) with the average of 6.70 mu g m(-3) for PM2.5, and from 2.62 to 7.27 mu g m(-3) With the average of 4.64 mu g m(-3) for PM0.1. The most abundant species on the backup quartz filters was OC1 for both PM2.5 and PM0.1, accounting for 56.9% and 41.1% of the measured organic carbon, respectively. Most of EC fractions (EC1-EC3) on the backup filters for PM2.5 and PM0.1 were below the minimum detection limit. Therefore, only OC contributed to positive artifacts distinctly with the average percentage of 21.7% and 48.0% for PM2.5 and PM0.1, respectively. The artifacts for four organic carbon fractions ranged from 36.1% (OC1) to 4.4% (OC4) for PM2.5 and from 68.0% (OC1) to 31.9% (OC4) for PM0.1]. The uncorrected OC/EC ratios on the front quartz filters were higher by as much as 30% and 107% for PM2.5 and PM0.1 than those corrected for positive organic artifacts, respectively. That is, much higher percentage of positive artifacts was found for PM0.1 DC fractions on the front filters. The comparison of the present and previous studies shows that OC positive artifacts vary widely among various PM fractions and sampling sites attributing to many factors that are worth investigating in the future.

KeywordPositive Artifacts Organic Carbon Pm2.5 Pm0.1 Tunnel
DOI10.1016/j.atmosenv.2012.02.060
Indexed BySCI ; EI
Language英语
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/10182
Collection粉尘与环境研究室
Corresponding AuthorTsai, CJ (Tsai, Chuen-Jinn)[1]
Affiliation1.Institute of Environmental Engineering, National Chiao Tung University, Hsinchu, Taiwan;
2.SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an, China;
3.Institute of Global Environmental Change, Xi’an Jiaotong University, Xi’an, China;
4.Environmental Analysis Laboratory, Environmental Protection Administration, Jhongli 320, Taiwan
Recommended Citation
GB/T 7714
Zhu, CS ,Tsai, CJ ,Chen, SC ,et al. Positive sampling artifacts of organic carbon fractions for fine particles and nanoparticles in a tunnel environment[J]. ATMOSPHERIC ENVIRONMENT,2012,54:225-230.
APA Zhu, CS ,Tsai, CJ ,Chen, SC ,Cao, JJ ,&Roam, GD .(2012).Positive sampling artifacts of organic carbon fractions for fine particles and nanoparticles in a tunnel environment.ATMOSPHERIC ENVIRONMENT,54,225-230.
MLA Zhu, CS ,et al."Positive sampling artifacts of organic carbon fractions for fine particles and nanoparticles in a tunnel environment".ATMOSPHERIC ENVIRONMENT 54(2012):225-230.
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