Facultatea de Fizică
Universitatea "Al.I.Cuza" Iaşi
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| Titlu: Titrarea turbidimetrică. Aparatură şi aplicaţii |
| Autori: L. Bucur1, M.-O. Apostu2, A. Onu2, V. Ţura1, G. Sîrghie1, G. Ţibu1, V. Melnig1 |
| Afiliere: 1Universitatea “Al.I.Cuza”, Iaşi, Facultatea de Fizică
2Universitatea “Al.I.Cuza”, Iaşi, Facultatea de Chimie |
| Abstract: A number of lights scattering phenomena have been studied, for example, turbidimetry, nephelometry, Tyndall effects, dissymmetry of depolarization, etc. One of the effects of interest is the scattering from dilute solutions of macromolecules, mathematical analysis and expressions for solute molecular weight being obtained by treating the scattering as resulting from statistical fluctuations in the density of the solvent and in the concentration of the solute, which produce momentary variation in dielectric constant and therefore in refractive index. The study of the intensity of the light scattered by a solution of a high (bio)polymer may be used to determine the molecular weight and the shape of these molecules [1]. In this paper we present the design, construction and several test of a home-made high quality set-up for measuring turbidity of (bio)polymer solutions. |
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