Sampling and conditioning artifacts of PM2.5 in filter-based samplers
作者： Chun-Nan Liu , Sih-Fan Lin , Amit Awasthi , Chuen-Jinn Tsai , Yueh-Chuen Wu
DOI: 10.1016/J.ATMOSENV.2013.11.075
关键词:
摘要: Abstract Field studies were conducted at Taiwan National Chiao-Tung University (NCTU) campus to evaluate the evaporation loss of fine particles (PM 2.5 ) collected by multi-filter PM 10 –PM sampler (MFPPS), which was collocated with a dichotomous (Dichot, Andersen, Model SA-241), WINS (Thermo, 2000-FRM), and tapered element oscillating microbalance filter dynamic measurement system (TEOM-FDMS, Thermo, 1405-DF). Porous-metal denuder samplers (PDSs) installed in sampling channels MFPPS measure concentration evaporated ion species. Results showed that severe during sampling, accounting for 5.8–36.0% corrected percentage increased decreasing loaded particle mass increasing filtration velocity. During 24-h NH 4 + , NO 3 − Cl concentrations accounted 9.5 ± 6.2, 5.4 ± 3.7, 2.0 ± 1.3% concentration, respectively, or 46.4 ± 19.2, 66.9 ± 18.5, 74.4 ± 14.0% each species, respectively. Due loss, measured WINS, Dichot, lower than those TEOM-FDMS 16.6 ± 9.0, 15.2 ± 10.6 12.5 ± 8.8%, When determined PDS, good agreement achieved.
nctu.edu.tw
harvard.edu参考文章(27)
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