PMID: 16509341Mar 3, 2006Paper

Effects of sampling artifacts and operating parameters on the performance of a semicontinuous particulate elemental carbon/organic carbon monitor

Environmental Science & Technology
Mohammad ArhamiConstantinos Sioutas

Abstract

The carbonaceous component of atmospheric particulate matter (PM) is considered very important with respect to the observed adverse health effects of PM. Particulate organic and elemental carbon have traditionally been measured off-line after daily, time-integrated particle collection on filters. However, the subdaily or hourly variability of elemental carbon (EC) and organic carbon (OC) can help to assess the variability of sources, ambient levels, and human exposure. In this study, the performance of the Sunset Laboratory Inc. semicontinuous EC/OC monitorwas assessed in a Los Angeles location representing typical urban pollution. An intermonitor comparison showed high precision (R2 of 0.98 and 0.97 for thermal OC and EC, respectively). By changing the inlet configurations of one of the monitors (adding a denuder, a Teflon filter, or both), the influences of positive and negative sampling artifacts were investigated. The positive artifact was found to be relatively large (7.59 microg/m3 on average), more than 50% of measured OC, but it was practically eliminated with a denuder. The negative artifact was much smaller (less than 20% of the positive artifact) and may be neglected in most cases. A comparison of different temperatu...Continue Reading

References

Dec 26, 2001·Toxicological Sciences : an Official Journal of the Society of Toxicology·Yohannes TesfaigziJoe L Mauderly
Apr 5, 2003·Environmental Health Perspectives·Gregory A WelleniusRichard L Verrier
Jan 9, 2004·Epidemiology·Kristi Busico MetzgerHoward Frumkin
Sep 1, 1994·Environmental Science & Technology·L M HildemannG R Cass

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Citations

Sep 18, 2009·Environmental Monitoring and Assessment·Yan ChengKochy Fung
May 24, 2007·Journal of the Air & Waste Management Association·John H OffenbergMohammed Jaoui
Feb 10, 2009·Environment International·Y ChengJ H Tan
Jan 23, 2010·Analytical Chemistry·Chao LuPurnendu K Dasgupta
Jul 13, 2013·Environmental Science & Technology·Bing ChenÖrjan Gustafsson
Apr 19, 2007·Environmental Science & Technology·Leonidas NtziachristosConstantinos Sioutas

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