Patent ID: 9638665
Date: 2017-05-02
CPC Classifications: G01N

Claim:
1. A method for obtaining aerosol particle size distributions with a scanning mobility particle sizer (SMPS) device comprising a differential mobility analyzer (DMA); which method comprises the stages: (i) collecting a first data set of particle concentrations vs. size for a size range from a predetermined minimal size D (ii) changing the sheath flow rate from the first sheath flow rate Q (iii) collecting a second data set of particle concentrations vs. size for a size range from the intermediate size D (iv) convolving the first data set from stage (i) using an apparatus function of the DMA and the sheath flow rates Q (v) combining the convolved data set from stage (iv) with the second data set from stage (iii) to form a merged data set corresponding to the size distribution from D (vi) deconvolving the merged data set to provide a size distribution for the full size range D