Particle Size Measurements for Spheres With Diameters of 50 nm to 400 nm.
Particle Size Measurements for Spheres With Diameters of
50 nm to 400 nm.
Donnelly, M. K.; Mulholland, G. W.
NISTIR 6935; 19 p. August 2003.
particle size; nanoparticles
This paper describes a calibration service NIST is
offering that measures the effective diameter of
particles suspended in liquids using electrical
differential mobility analysis. Measurements are for
particles with diameters in the range of 50 nm to 400
nm. Electrical differential mobility analysis separates
aerosol particles based on the particle size dependence
of their electrical mobility. This measurement method
was chosen because it offers lower uncertainty for
particles smaller than 400 nm compared to other methods.
Detailed descriptions of the calibration system,
operating procedures, and analysis method are included.
Customer information regarding test sample requirements,
measurement uncertainty analysis, and quality control
procedures is also included in the paper.