Notice of RetractionExposure Monitoring of Aerosols in Different Indoor and Outdoor Environments

Notice of Retraction

After careful and considered review of the content of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE´s Publication Principles.

We hereby retract the content of this paper. Reasonable effort should be made to remove all past references to this paper.

The presenting author of this paper has the option to appeal this decision by contacting TPII@ieee.org.

In this paper a world-wide first portable nanoparticle detector is introduced and used for aerosol exposure monitoring in different indoor and outdoor environments. This nanoparticle counter, consisting of a unipolar diffusion charger, a time multiplexed electrical conductivity measurement and an aerosol faraday cup electrometer, is operated with any Grimm laser aerosol spectrometer or environmental dust monitor, and extends the lower limit of particle size down to 25nm. The whole compact system allows continuous monitoring of the aerosol exposure in the size range from 25nm to over 32μm, reporting the particle number or mass concentrations with more than 30 size channels, occupational mass fractions, PM values, as well as mean diameter and total counts of nanoparticles ranging from 25mn to 300nm. Some on-line monitoring results on the aerosol exposure in the indoor and outdoor air are presented and analyzed. This unique technique finds many applications such as production process control, workplace exposure monitoring, indoor and outdoor air quality monitoring.