Spatially resolved measurements of size and velocity distributions of aerosol droplets from a direct injection nebulizer

Journal Article · Sat May 01 00:00:00 EDT 1993 · Applied Spectroscopy; (United States)

DOI:https://doi.org/10.1366/0003702934067108· OSTI ID:5782955

Shum, S C.K.; Johnson, S K; Pang, H M; Houk, R S ^[1]

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1. Ames Lab., Iowa State Univ. (United States)

Aerosol droplet sizes and velocities from a direct injection nebulizer (DIN) are measured with radial and axial spatial resolution by phase Doppler particle analysis (PDPA). The droplets on the central axis of the spray become finer and their size becomes more uniform when [approx]20% methanol is added to the usual aqueous solvent. This could explain why the analyte signal is a maximum at this solvent composition when the DIN is used for inductively coupled plasma-mass spectrometry (ICP-MS). Mean droplet velocities are 12 to 22 m s[sup [minus]1] with standard deviations of [plus minus]4 to [plus minus]7 m s[sup [minus]1]. The outer fringes of the aerosol plume tend to be enriched in large droplets. The Sauter mean diameter (D[sub 3,2]) and velocity of the droplets also vary substantially with axial position in the aerosol plume. 35 refs., 10 figs., 1 tab.

• OSTI ID: 5782955
• Journal Information: Applied Spectroscopy; (United States), Vol. 47:5; ISSN 0003-7028
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
47 OTHER INSTRUMENTATION
DROPLETS
SIZE
VELOCITY
AEROSOLS
DOPPLER EFFECT
INJECTION
MASS SPECTROSCOPY
SPATIAL RESOLUTION
COLLOIDS
DISPERSIONS
INTAKE
PARTICLES
RESOLUTION
SOLS
SPECTROSCOPY
400102* - Chemical & Spectral Procedures
440800 - Miscellaneous Instrumentation- (1990-)