Phase-Doppler diagnostic studies of primary and tertiary aerosols produced by a high-efficiency nebulizer

Journal Article · Sat Oct 01 00:00:00 EDT 1994 · Analytical Chemistry (Washington); (United States)

DOI:https://doi.org/10.1021/ac00091a037· OSTI ID:6923193

Liu, H; Montaser, A ^[1]

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1. George Washington Univ., Washington, DC (United States)

Two phase-Doppler instruments (a two- and a four-beam laser light-scattering interferometer) are used for the diagnostic studies of aerosol produced by a pneumatically driven high-efficiency nebulizer (HEN). The new nebulizer (capillary i.d. = 79 [mu]m) is useful in plasma spectrometries for nebulization of solutions at uptake rates of 10-1200 [mu]L/min. Diagnostic studies involve measurements on primary and tertiary aerosols prior to injection into a high-temperature plasma. Simultaneous measurements are conducted on droplet size and droplet velocity distributions, size-velocity correlation, span of aerosols, droplet number density, volume flux, and percent volume of aerosol droplets under 8 [mu]m. The four beam interferometer (or the 2D phase-Doppler system) is used to assess the axial and radial velocity components of the primary aerosol from the HEN. A broad range of droplet velocities is observed near the nebulizer tip for the primary aerosol, but most tertiary droplets travel at nearly the same velocity, much slower than the primary droplets. The Sauter mean diameter (D[sub 3,2]) of the primary aerosol is found to increase both along the center line of the aerosol pathway and at the boundary of the spray. 34 refs.., 9 figs., 2 tabs.

• DOE Contract Number: FG02-93ER14320
• OSTI ID: 6923193
• Journal Information: Analytical Chemistry (Washington); (United States), Journal Name: Analytical Chemistry (Washington); (United States) Vol. 66:19; ISSN 0003-2700; ISSN ANCHAM
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102* -- Chemical & Spectral Procedures
661300 -- Other Aspects of Physical Science-- (1992-)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AEROSOLS
CHEMICAL ANALYSIS
COLLOIDS
COMPILED DATA
DATA
DISPERSIONS
DOPPLER EFFECT
DROPLETS
ELECTROMAGNETIC RADIATION
FLUID MECHANICS
INFORMATION
INTERFEROMETERS
INTERFEROMETRY
LASER RADIATION
LIGHT SCATTERING
MEASURING INSTRUMENTS
MECHANICS
MIXTURES
NUMERICAL DATA
PARTICLES
PLASMA
PNEUMATICS
PRODUCTION
RADIATIONS
SCATTERING
SOLS
SOLUTIONS
SPECTROSCOPY
SURFACE PROPERTIES
SURFACE TENSION
TURBIDITY
VISCOSITY