Skip to main content

Open Access Absolute Mass and Size Measurement of Monodisperse Particles Using a Modified Millikan's Method: Part II—Application of Electro-Gravitational Aerosol Balance to Polystyrene Latex Particles of 100 nm to 1 μm in Average Diameter

Download Article:
(PDF 1551.9794921875 kb)
The masses and diameters of monodisperse polystyrene latex particles ranging from 100 nm to 1 μ m in average diameter were determined using the electro-gravitational aerosol balance, a method that we proposed in a previous paper. Charged latex particles were introduced between parallel plate electrodes similar to a Millikan cell, and the particle survival rate after a certain holding time had elapsed was measured as a function of the applied voltage. The number average diameter and the corresponding particle mass were determined by fitting a theoretical survival rate spectrum to the experimentally observed spectrum using the least squares method. In this fitting, the value of the particle density obtained in a separate experiment was used. Detailed uncertainty analysis of the number average diameters thus determined was carried out. The expanded uncertainty with a coverage factor of 2, which corresponds approximately to a 95% confidence interval, was 0.66 nm, or 0.66%, for 100 nm particles and 1.8 nm, or 0.18%, for 1 μ m particles. The diameter values of 200 nm particles obtained under different operating conditions were found to agree within 0.3%. These results demonstrate that the present method is appropriate for use as the primary sizing method to develop particle size standards in the size range of 100 nm to 1 μ m.
No References for this article.
No Supplementary Data.
No Data/Media
No Metrics

Document Type: Research Article

Affiliations: National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki, Japan

Publication date: 2006-07-01

More about this publication?
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more