國家衛生研究院 NHRI:Item 3990099045/9948

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Please use this identifier to cite or link to this item: http://ir.nhri.org.tw/handle/3990099045/9948

Title:	Field performance of a semi-continuous monitor for ambient PM2.5 water-soluble inorganic ions and gases at a suburban site
Authors:	Young, LH;Li, CH;Lin, MY;Hwang, BF;Hsu, HT;Chen, YC;Jung, CR;Chen, KC;Cheng, DH;Wang, VS;Chiang, HC;Tsai, PJ
Contributors:	National Institute of Environmental Health Sciences
Abstract:	To reduce sampling artifacts and to improve time-resolved measurements of inorganic aerosol system, a recently commercialized semi-continuous In-situ Gas and Aerosol Composition (IGAC) monitoring system was evaluated against a reference annular denuder system (ADS; denuder/two-stage filter pack) at a suburban site over a year, during which the average PM2.5 was 37.0 ± 24.8 μg/m3. A suite of eight ions SO42−, NO3−, Cl−, NH4+, Na+, K+, Ca2+ and Mg2+ and two gases SO2 and NH3 were the target species. In comparison to the reference ADS method, the IGAC performed well in measuring the major ions SO42−, NO3− and NH4+, and the SO2. For those species, the linear slopes, intercepts and R2 values between the two methods all passed the performance evaluation criteria outlined by earlier similar studies. The performance of IGAC on Cl−, Na+, K+ and NH3 was marginally acceptable, whereas Ca2+ and Mg2+ could not be properly evaluated due to the low concentrations (<0.2 μg/m3) and hence inadequate amount of sample size. The ionic balance of the hourly IGAC samples averaged very close to unity, as did the daily ADS samples, though the former was considerably more variable than the latter. The overall performance of the IGAC has been shown to be comparable to other similar monitors and its improvements are discussed.
Date:	2016-11
Relation:	Atmospheric Environment. 2016 Nov;144:376-388.
Link to:	http://dx.doi.org/10.1016/j.atmosenv.2016.08.062
JIF/Ranking 2023:	http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=NHRI&SrcApp=NHRI_IR&KeyISSN=1352-2310&DestApp=IC2JCR
Cited Times(WOS):	https://www.webofscience.com/wos/woscc/full-record/WOS:000385326100037
Cited Times(Scopus):	http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84988027095
Appears in Collections:	[Hung-Che Chiang] Periodical Articles [Yu-Cheng Chen] Periodical Articles

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