Simultaneous determination of refractive index and density of an evaporating aqueous solution droplet

Journal Article · Mon Dec 31 23:00:00 EST 1990 · Aerosol Science and Technology; (United States)

DOI:https://doi.org/10.1080/02786829108959527· OSTI ID:5607459

Tang, I N; Munkelwitz, H R ^[1]

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1. Brookhaven National Lab., Upton, NY (United States)

Ambient aerosols, which are composed mostly of water-soluble inorganic salts, play an important role in many atmospheric processes affecting air quality, local visibility, and the climate as well. The experimental technique and computational method developed for simultaneous determination of refractive index and density of an electrolyte solution droplet undergoing evaporation at 25C are described. Results are presented for the systems (NH{sub 4}){sub 2}SO{sub 4}-H{sub 2}O, Na{sub 2}SO{sub 4}-H{sub 2}O, and NaNO{sub 3}-H{sub 2}O over a wide concentration range from high dilution to critical supersaturation. It is shown that the partial molal refraction derived for each electrolyte is remarkably constant throughout the entire concentration region, thereby validating the partial molal refraction approach for predicting the refractive index of highly supersaturated solutions.

• DOE Contract Number: AC02-76CH00016
• OSTI ID: 5607459
• Journal Information: Aerosol Science and Technology; (United States), Journal Name: Aerosol Science and Technology; (United States) Vol. 15:3; ISSN 0278-6826; ISSN ASTYD
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
AEROSOLS
AIR QUALITY
AQUEOUS SOLUTIONS
CALCULATION METHODS
COLLOIDS
DENSITY
DISPERSIONS
ECOLOGICAL CONCENTRATION
ELECTROLYTES
ENVIRONMENTAL QUALITY
EVAPORATION
MIXTURES
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
SOLS
SOLUTIONS
THERMODYNAMICS