- Author
-
Ehara, K.
- Title
- Development of Methods for Mass Measurement of Aerosol Particles. BFRL Fire Research Seminar. VHS Video.
- Coporate
- National Research Laboratory of Metrology, Tsukuba, Japan
- Report
-
Video
February 1, 2001
- Keywords
-
aerosols
|
diffusion
|
light scattering
- Abstract
- A variety of measurement instruments for aerosol particles are now available, which include, for example, the differential mobility analyzer, the impactor, the diffusion battery, and the light scattering particle counter. Generally, these instruments are for measurement of particle size or size-related quantities; few instruments are designed to measure the mass of particles. In this talk, I will describe our development of two instruments intended for measurement of particle mass, which is typically on the order of femtograms. One instrument is the Electro-gravitational Aerosol Balance (EAB), which is based on the loss rate of charged particles introduced into a Millikan type cell. Application of the EAB to absolute size measurement of monodisperse polystyrene latex particles will be discussed. The other instrument is the Aerosol Particle Mass Analyzer (APM), which works by balancing the centrifugal and electrostatic forces exerted on particles introduced in coaxial cylindrical electrodes which rotate. Particles having a limited range of mass-to-charge ratio are filtered out from the APM. I will present the basic performance of the APM, which is currently under development, as well as its application to the measurement of density of aerosol particles.