Osmotic method for determining the molecular weight of solutes i

Details Osmotic method for determining the molecular weight of solutes i Osmotic method for determining the molecular weight of solutes i

1989-08-31

1990-11-27

Williams, Hezron E.

Measuring and testing

Liquid analysis or analysis of the suspension of solids in a...

Content or effect of a constituent of a liquid mixture

73 643, G01N 3000

Patent

active

049727010

ABSTRACT:
There is disclosed apparatus and method for determining molecular weight by osmometry. A fluid circuit is used having two pressure measurement zones, one responsive only to viscosity effects and the other to both viscosity and osmotic effects. The osmotic effects are caused by cross-linked polymeric material within one zone capable of expanding and contracting in response to the presence of a solvent and a solution, respectively, thereby changing the effective radius of the zone and hence the pressure.

REFERENCES:
patent: 4505149 (1985-03-01), Trumbore
patent: 4627271 (1986-12-01), Abbott et al.
patent: 4775943 (1988-10-01), Chamberlin et al.
patent: 4876882 (1989-10-01), Yau
Billmeyer, Textbook of Polymer Science, Third Edition, John Wiley & Sons, pp. 186-197 (1984).
Ouano, A. Gel Permeation Chromatography VII-Molecular Weight in Journ. of Poly. Sci. No. 43, pp. 299-310, 1973.

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