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Field study of a soft X-ray aerosol neutralizer combined with electrostatic classifiers for nanoparticle size distribution measurements

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Particuology 2018年第2期16卷 99-106页

作者： Alessia Nicosia Laura Manodori Arianna Trentini Isabella Ricciardelli dimitri bacco Vanes Poluzzi Lorenza Di Matteo Franco Belosi Institute of Atmospheric Sciences and Climate (ISAC)-CNR Bologna Italy Department of Physics and Earth Sciences University of Ferrara 44122 Ferrara Italy ECSIN - European Center for the Sustainable Impact ofNanotechnology Veneto Nanotech Scpa Rovigo Italy d Regional Agency for Prevention Environment and Energy of Emilia-Romagna (ARPAE) Bologna Italy Regional Agency for Prevention Environment and Energy of Emilia-Romagna (ARPAE) Bologna Italy University of Eastern Piedmont "A. Avogadro" Department of Science and Technology Innovation Alessandria Italy

Most conventional aerosol neutralizers are based on radioactive sources, which are controlled by strict regulations restricting their handling, transport, and storage. The TSI 3087 soft X-ray （SXR） neutralizer circumvents these legal restrictions. The aim of the present work is to compare the performance of a standalone SXR aerosol neutralizer with that of conventional radioactive aerosol neutralizers based on 85Kr （TSI 3077） and 241Am （Grimm 5522） by performing field tests in a real environmental scenario. The results obtained when the SXR neutralizer was connected to a mobility particle sizer spectrometer （MPS）, different from the device suggested by the manufacturer, were comparable with those obtained with the use of radioactive aerosol neutralizers. In changing the neutralizer, the particle number concentrations, measured with the MPS connected to the SXR neutralizer, almost remained within the 10% uncertainty bounds for the particle size interval 10-300 nm, when diffusion losses inside the SXR tube were considered. Based on our comparisons, the SXR neutralizer can be regarded as a standalone instrument that could solve the problems associated with legal restrictions on radioactive neutralizers and fulfil the need for a portable instrument for different field test purposes.

关键词： Aerosol neutralizer Soft X-ray non-radioactive charger Mobility particle sizer spectrometer Particle size distribution Diffusion losses

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