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Titolo:
Comparison of two particle-size spectrometers for ambient aerosol measurements
Autore:
Tuch, T; Mirme, A; Tamm, E; Heinrich, J; Heyder, J; Brand, P; Roth, C; Wichmann, HE; Pekkanen, J; Kreyling, WG;
Indirizzi:
Univ Munich, Inst Med Data Management Biometr & Epidemiol, Munich, GermanyUniv Munich Munich Germany agement Biometr & Epidemiol, Munich, Germany Tartu State Univ, EE-202400 Tartu, Estonia Tartu State Univ Tartu Estonia EE-202400 Univ, EE-202400 Tartu, Estonia Natl Publ Hlth Inst, Environm Epidemiol Unit, Kuopio, Finland Natl Publ Hlth Inst Kuopio Finland ronm Epidemiol Unit, Kuopio, Finland GSF, Natl Res Ctr Environm & Hlth, Inst Epidemiol, Neuherberg, Germany GSF Neuherberg Germany ronm & Hlth, Inst Epidemiol, Neuherberg, Germany GSF, Natl Res Ctr Environm & Hlth, Inst Inhalat Biol, Neuherberg, Germany GSF Neuherberg Germany m & Hlth, Inst Inhalat Biol, Neuherberg, Germany
Titolo Testata:
ATMOSPHERIC ENVIRONMENT
fascicolo: 1, volume: 34, anno: 2000,
pagine: 139 - 149
SICI:
1352-2310(2000)34:1<139:COTPSF>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
PARTICULATE AIR-POLLUTION; ENVIRONMENTAL AEROSOLS; ULTRAFINE PARTICLES; EASTERN-EUROPE; FLOW-RATES; PERFORMANCE; MORTALITY; CHILDREN; COUNTER; GERMANY;
Keywords:
aerosol spectrometers; ambient aerosol; particle number distribution;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Physical, Chemical & Earth Sciences
Citazioni:
39
Recensione:
Indirizzi per estratti:
Indirizzo: Tuch, T Univ Munich, Inst Med Data Management Biometr & Epidemiol, Munich,Germany Univ Munich Munich Germany Biometr & Epidemiol, Munich, Germany
Citazione:
T. Tuch et al., "Comparison of two particle-size spectrometers for ambient aerosol measurements", ATMOS ENVIR, 34(1), 2000, pp. 139-149

Abstract

There is an ongoing debate on the question which size fraction of particles in ambient air may be responsible for human health effects observed in epidemiological studies. Since there is no single instrument available for the measurement of the particle-size distribution over the full range of the fine fraction (diameter < 2.5 mu m) of the atmospheric aerosol, two instruments, the mobile aerosol spectrometer (MAS) and the electrical aerosol spectrometer (EAS), have been tested in a side-by-side comparison measuring ambient aerosol for a time period of six weeks in spring 1996 in the city of Erfurt, Germany. Furthermore, total particle number concentration measured by a condensation particle counter (CPC) and mass concentrations PM10 and PM2.5 were determined. Both spectrometers, MAS and EAS, are based on electrical mobility measurements for particles < 0.1 mu m and < 0.5 mu m, respectively, while MAS applies optical particle spectrometry and EAS applies again electrical mobility analysis for particles up to 2.5 and 10 mu m, respectively. Both instruments proved to be reliable during this comparison providing data availability of > 94%. To compare the spectral data, particle numbers were integrated within three size ranges: 0.01 - 0.1, 0.1 - 0.5, 0.5 - 25mu m. Hourly mean number concentrations of each size range observed duringthe sig week comparison was: 2.6 x 10(4) +/- 19500 (2.48 x 10(4) +/- 1.79 x 10(4)), 3.1 x 10(3) +/- 1.5 x 10(3) (4.1 x 10(3) +/- 2.0 x 10(3)), 50 +/-45 (1.9 x 10(2) +/- 1.2 x 10(2)) cm(-3) for MAS (EAS), respectively. Both aerosol spectrometers followed the variations of the ambient aerosol in a similar manner and yielded almost identical results for particle number concentrations of particles with diameters smaller than 0.5 mu m Furthermore, the total particle number concentration derived from MAS and EAS measurements (29000 +/- 20000; 29000 +/- 19000 cm(-3)) is well comparable with the number concentration derived from an integral counting CPC (31100 +/- 22000 cm(-3)). The results of this side-by-side comparison suggest that MAS and EAStogether with PM2.5 measurements are suitable to reliably characterize size-distribution parameters of number and mass concentration of ambient aerosols. (C) 1999 Elsevier Science Ltd. All rights reserved.

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Documento generato il 06/04/20 alle ore 21:27:50