Accession Number:

ADA045528

Title:

Enhancement of Pneumatic Nebulization Efficiency through Application of an Electric Field.

Descriptive Note:

Technical rept.,

Corporate Author:

INDIANA UNIV BLOOMINGTON DEPT OF CHEMISTRY

Personal Author(s):

Report Date:

1977-10-01

Pagination or Media Count:

34.0

Abstract:

A novel technique is described for reducing the size of aerosol droplets produced by a pneumatic nebulizer of the kind commonly used in flame or plasma spectrometry. The technique involves the application of an electric field to the tip of the nebulizer, resulting in an induced surface charge on the liquid being nebulized. In turn, the surface charge reduces the liquids surface tension and results in the generation of a finer aerosol. In this study, the effect of the electric field is quantified in terms of the spatial dispersion and size distribution of aerosol droplets formed in the presence and absence of the field. Droplet size distributions, obtained using the MgO impression technique and analyzed using log-normal and upper-limit functions, reveal a 63 decrease in the volume mean droplet diameter in the fields presence. As a result, this system is expected to be useful in both flame and plasma spectrometry, where reduced droplet size can yield improved precision and freedom from interferences. Adaptation to existing flame or plasma spectrometers is expected to be straight-forward because of the new devices simple design. Author

Subject Categories:

  • Test Facilities, Equipment and Methods
  • Atomic and Molecular Physics and Spectroscopy
  • Nuclear Physics and Elementary Particle Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE