Publication Details

Category Text Publication
Reference Category Journals
DOI 10.1016/S0048-9697(01)00648-9
Title (Primary) PM2.5 measurements in ambient aerosol: comparison between Harvard impactor (HI) and the tapered element oscillating microbalance (TEOM) system
Author Cyrys, J.; Dietrich, G.; Kreyling, W.; Tuch, T.; Heinrich, J.
Source Titel Science of the Total Environment
Year 2001
Department EXPOEPID
Volume 278
Issue 1-3
Page From 191
Page To 197
Language englisch
Keywords PM2.5; TEOM; Harvard impactor
Abstract

A comparison, based on the regression of 32 daily mean PM2.5 aerosol loadings determined by a tapered element oscillating microbalance (TEOM) and by a Harvard impactor (HI), is reported for the ambient aerosol of Erfurt (Germany). The PM2.5 concentrations measured by the TEOM were systematically lower then those obtained by the HL The ratio of the means TEOM/HI was 0.74 and the regression equation is TEOM = 0.69 X HI + 0.071. This result is consistent with reports elsewhere suggesting that semi-volatile aerosol material is lost from the heated sample filter on the TEOM. To verify this assertion, a heating system was developed for the HI which was able to keep the HI sample filter at 50 +/- 1 degreesC. After the implementation of this heating system, no systematically differences were observed between the TEOM and the heated HI system. The ratio of means was 1.06 and the regression equation TEOM = 1.10 X HI - 0.668. Because the measured levels of ammonium nitrate were very low in Erfurt, we concluded that other compounds like semi-volatile organics were responsible for the loss of particulate material at 50 degreesC.
Persistent UFZ Identifier https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=6257
Cyrys, J., Dietrich, G., Kreyling, W., Tuch, T., Heinrich, J. (2001):
PM2.5 measurements in ambient aerosol: comparison between Harvard impactor (HI) and the tapered element oscillating microbalance (TEOM) system
Sci. Total Environ. 278 (1-3), 191 - 197 10.1016/S0048-9697(01)00648-9