Method for determining thermodynamic and molecular properties in

Details Method for determining thermodynamic and molecular properties in Method for determining thermodynamic and molecular properties in

1995-02-28

1996-11-12

Brock, Michael

Measuring and testing

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

Molecular weight

422 681, G01N 3300

Patent

active

055742157

ABSTRACT:
A method for calculating the average molecular weight of individual molecules in a sample, where the molecules in solution associate to form clusters. Data sets of apparent molecular weight of the sample versus concentration of the sample in the solvent are generated. The basic principles and technology in generation of the data is the well understood action of a solute upon the solvent vapor pressure above the solution. By observing the effect of a sample solute on the temperature/vapor pressure properties of a solvent, it is possible by known methods to determine its molecular weight. When dealing with a solute material that tends to form clusters, however, the molecular weight found is an apparent molecular weight, i.e. the average molecular weight of all of the particles, which are the clusters and any unassociated molecules, if any. To determine the true molecular weight, a method employing the determined apparent molecular weights, referred to herein as the BRD method, is used. Since the method is based upon cluster thermodynamics and equilibrium properties, it reflects more accurately the behavior of the clusters at various dilutions. The method provides a basis for the prediction of thermodynamic and equilibrium properties, which was not possible with previous methods.

REFERENCES:
patent: 5341672 (1994-08-01), Kawanami et al.

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