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dc.contributor.authorTsai, Chuen-Jinnen_US
dc.contributor.authorLiu, Chun-Nanen_US
dc.contributor.authorHung, Shao-Mingen_US
dc.contributor.authorChen, Sheng-Chiehen_US
dc.contributor.authorUang, Shi-Nianen_US
dc.contributor.authorCheng, Yung-Sungen_US
dc.contributor.authorZhou, Yueen_US
dc.date.accessioned2014-12-08T15:22:42Z-
dc.date.available2014-12-08T15:22:42Z-
dc.date.issued2012-04-17en_US
dc.identifier.issn0013-936Xen_US
dc.identifier.urihttp://hdl.handle.net/11536/16032-
dc.description.abstractA novel active personal nanoparticle sampler (PENS), which enables the collection of both respirable particulate mass (RPM) and nanoparticles (NPs) simultaneously, was developed to meet the critical demand for personal sampling of engineered nanomaterials (ENMs) in workplaces. The PENS consists of a respirable cyclone and a micro-orifice impactor with the cutoff aerodynamic diameter (d(pa50)) of 4 mu m and 100 nm, respectively. The micro-orifice impactor has a fixed micro-orifice plate (137 nozzles of 55 mu m in the inner diameter) and a rotating, silicone oil-coated Teflon filter substrate at 1 rpm to achieve a uniform particle deposition and avoid solid particle bounce. A final filter is used after the impactor to collect the NPs. Calibration results show that the d(pa50) of the respirable cyclone and the micro-orifice impactor are 3.92 +/- 0.22 mu m and 101.4 +/- 0.1 nm, respectively. The d(pa50) at the loaded micro-Al2O3 mass of 0.36-3.18 mg is shifted to 102.9-101.2 nm, respectively, while it is shifted to 98.9-97.8 nm at the loaded nano-TiO2 mass of 0.92-1.78 mg, respectively. That is, the shift of d(pa50) due to solid particle loading is small if the PENS is not overloaded. Both NPs and RPM concentrations were found to agree well with those of the IOSH respirable cyclone and MOUDI. By using the present PENS, the collected samples can be further analyzed for chemical species concentrations besides gravimetric analysis to determine the actual exposure concentrations of ENMs in both RPM and NPs fractions in workplaces, which are often influenced by the background or incident pollution sources.en_US
dc.language.isoen_USen_US
dc.titleNovel Active Personal Nanoparticle Sampler for the Exposure Assessment of Nanoparticles in Workplacesen_US
dc.typeArticleen_US
dc.identifier.journalENVIRONMENTAL SCIENCE & TECHNOLOGYen_US
dc.citation.volume46en_US
dc.citation.issue8en_US
dc.citation.epage4546en_US
dc.contributor.department環境工程研究所zh_TW
dc.contributor.departmentInstitute of Environmental Engineeringen_US
dc.identifier.wosnumberWOS:000302850300040-
dc.citation.woscount18-
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