ACS  Vol.4 No.4 , October 2014
Application of the Soft X-Ray TSI Advanced Aerosol Neutralizer to Aerosol Measurements Made by a Grimm SMPS
Scanning Mobility Particle Sizer (SMPS) spectrometers are subject to several restrictions when a radioactive source is employed to bring the aerosol to a steady-state charge distribution. An alternative solution, commercially available, is represented by the soft X-ray neutralizer. The present study investigates the outcome of a combination of a Grimm SMPS, which employs a 241Am radioactive source, with the soft X-ray advanced aerosol neutralizer (TSI model 3087). To date, the latter device has been interfaced only with TSI’s Electrostatic Classifiers. Particle size distribution of sodium chloride aerosol was measured with both neutralizers and it was found that the particle number concentration agreed to be within 9% for the 10 - 700 nm range. This difference mainly corresponds to the bias reported by TSI, when the X-ray device is mounted on a TSI spectrometer. It was concluded that the X-ray neutralizer could be usefully employed, as a standalone device, in combination with Grimm Electrostatic Classifiers.

Cite this paper
Nicosia, A. , Belosi, F. and Vazquez, B. (2014) Application of the Soft X-Ray TSI Advanced Aerosol Neutralizer to Aerosol Measurements Made by a Grimm SMPS. Atmospheric and Climate Sciences, 4, 636-641. doi: 10.4236/acs.2014.44056.
[1]   Hoppel, W.A. and Frick, G.M. (1990) The Nonequilibrium Character of the Aerosol Charge. Distributions Produced by Neutralizers. Aerosol Science and Technology, 12, 471-496.

[2]   Shimada, M., Han, B., Okuyama, K. and Otani, Y. (2002) Bipolar Charging of Aerosol Nanoparticles by a Soft X-Ray Photoionizer. Journal of Chemical Engineering of Japan, 35, 786-793.

[3]   Watson, J.G., Chow, J.C., Sodeman, D.A., Lowenthal, D.H., Chang, O.M.C., Park, K. and Wang, X. (2011) Comparison of four Scanning Mobility Particle Sizers at the Fresno Supersite. Particuology, 9, 204-209.

[4]   Wiedensohler, A., Birmili, W., Nowak, A., Sonntag, A., Weinhold, K., Merkel, M., Wehner, B., Tuch, T., Pfeifer, S., Fiebig, M., Fjaraa, A.M., Asmi, E., Sellegri, K., Depuy, R., Venzac, H., Villani, P., Laj, P., Aalto, P., Ogren, J.A., Swietlicki, E., Williams, P., Roldin, P., Quincey, P., Hüglin, C., Fierz-Schmidhauser, R., Gysel, M., Weingartner, E., Riccobono, F., Santos, S., Grüning, C., Faloon, K., Beddows, D., Harrison, R., Monahan, C., Jennings, S.G., O’Dowd, C.D., Marinoni, A., Horn, H.G., Keck, L., Jiang, J., Scheckman, J., McMurry, P.H., Deng, Z., Zhao, C.S., Moerman, M., Henzing, B., de Leeuw, G., Loschau, G. and Bastian, S. (2012) Mobility Particle Size Spectrometers: Harmonization of Technical Standards and Data Structure to Facilitate High Quality Long-Term Observations of Atmospheric Particle Number Size Distributions. Atmospheric Measurement Techniques, 5, 657-685.