An absolute method for aerosol particle mass and charge measurement

Mark A. Philip, Fred Gelbard, Stephen Arnold

Research output: Contribution to journalArticle

Abstract

An absolute method for single aerosol particle mass and charge measurement has been developed. The method involves suspension of a charged particle in an electrodynamic chamber called a quadrupole. From the voltage required to balance the particle against gravity, the particle charge-to-mass ratio can be measured. By irradiating the particle with ultraviolet light, a single electron can be removed and a new balancing voltage determined. From the balancing voltages measured before and after this so-called process of "electron-stepping," the particle mass and charge are determined absolutely without requiring knowledge of the particle shape, density, or any adjustable parameters. Excellent agreement is obtained by comparing the measured mass of calibration particles of known size.

Original languageEnglish (US)
Pages (from-to)507-515
Number of pages9
JournalJournal of Colloid and Interface Science
Volume91
Issue number2
DOIs
StatePublished - 1983

Fingerprint

particle mass
Aerosols
Particles (particulate matter)
aerosols
Electric potential
Electrons
Electrodynamics
Charged particles
electric potential
Suspensions
Gravitation
Calibration
electrodynamics
ultraviolet radiation
mass ratios
charged particles
electrons
quadrupoles
chambers
gravitation

ASJC Scopus subject areas

  • Colloid and Surface Chemistry
  • Physical and Theoretical Chemistry
  • Surfaces and Interfaces

Cite this

An absolute method for aerosol particle mass and charge measurement. / Philip, Mark A.; Gelbard, Fred; Arnold, Stephen.

In: Journal of Colloid and Interface Science, Vol. 91, No. 2, 1983, p. 507-515.

Research output: Contribution to journalArticle

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