TY - JOUR
T1 - An absolute method for aerosol particle mass and charge measurement
AU - Philip, Mark A.
AU - Gelbard, Fred
AU - Arnold, Stephen
N1 - Funding Information:
Support for this work was provided by NIEHS Grant 5P30-ES02109-03 under the Center for Health Effects of Fossil Fuels Utilization of Harvard-MIT Division of Health Sciences and Technology and the Energy Laboratory. Support for S.A. was provided by the NSF, Grant ATM 8006580. We would also like to thank R. A. Brown for the use of his computer code.
PY - 1983/2
Y1 - 1983/2
N2 - 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.
AB - 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.
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U2 - 10.1016/0021-9797(83)90365-X
DO - 10.1016/0021-9797(83)90365-X
M3 - Article
AN - SCOPUS:0000434134
SN - 0021-9797
VL - 91
SP - 507
EP - 515
JO - Journal of Colloid And Interface Science
JF - Journal of Colloid And Interface Science
IS - 2
ER -