Positive sampling artifacts of organic carbon fractions for fine particles and nanoparticles in a tunnel environment
作者： Chong-Shu Zhu , Chuen-Jinn Tsai , Sheng-Chieh Chen , Jun-Ji Cao , Gwo-Dong Roam
DOI: 10.1016/J.ATMOSENV.2012.02.060
关键词:
摘要: Abstract The positive artifacts in particulate organic carbon fractions for fine particles (PM2.5) and nanoparticles (PM0.1) were characterized a tunnel environment by using the QBQ (a quartz filter behind filter) method. OC concentrations of backup filters ranged from 3.56 to 11.38 μg m−3 with average 6.70 μg m−3 PM2.5, 2.62 7.27 μg m−3 4.64 μg m−3 PM0.1. most abundant species on was OC1 both PM2.5 PM0.1, accounting 56.9% 41.1% measured carbon, respectively. Most EC (EC1–EC3) PM0.1 below minimum detection limit. Therefore, only contributed distinctly percentage 21.7% 48.0% four 36.1% (OC1) 4.4% (OC4) 68.0% 31.9% uncorrected OC/EC ratios front higher as much 30% 107% than those corrected artifacts, That is, found filters. comparison present previous studies shows that vary widely among various PM sampling sites attributing many factors are worth investigating future.
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