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

Journal Article · Tue Jan 01 00:00:00 EST 1991 · Aerosol Science and Technology; (United States)

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

Tang, I N; Munkelwitz, H R ^[1]

---

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), Vol. 15:3; ISSN 0278-6826
• Country of Publication: United States
• Language: English

Related Subjects

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