Empirical method for determining the concentration of solids in suspension

Autor:	John W. Liskowitz
Rok vydání:	1971
Předmět:	Suspended solids Chemistry Analytical chemistry Environmental Chemistry HYDROSOL Depolarization General Chemistry Particle size Radiation Polarization (waves) Refractive index Optical path length
Zdroj:	Environmental Science & Technology. 5:1206-1211
ISSN:	1520-5851 0013-936X
DOI:	10.1021/es60059a009
Popis:	The degree of depolarization of back-scattered polarized radiation by model hydrosol systems has been investigated. A resulting empirical method for determining suspended solids concentrations has been established. Results show that the degree of depolarization is related to the volume concentration of suspended solids. The degree of depolarization increases with the refractive index ratio of the solid to the dispersing medium at values below 1.38 and remains constant in the 1.38 to 1.82 range. The degree of depolarization increases with the optical path length, but this increase is limited by the concentration of the solids and refractive index ratio of the suspension. The degree of depolarization is a single valued function with respect to concentration and is unaffected by such factors as particle shape, optical activity, and the solid deposits on the optical windows. This approach responds to a greater concentration range of particles and is less dependent on particle size than the commonly used transmission and light-scattering techniques.
Databáze:	OpenAIRE
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