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. 1989 Oct;91(2):766–769. doi: 10.1104/pp.91.2.766

Osmotic Pressure of Aqueous Polyethylene Glycols 1

Relationship between Molecular Weight and Vapor Pressure Deficit

Nicholas P Money 1,2
PMCID: PMC1062068  PMID: 16667097

Abstract

Osmotic pressures (II) of aqueous solutions of polyethylene glycols (PEGs) of average relative molecular weight (Mr) between 200 and 10,000 were measured using vapor pressure deficit osmometry. The relationships between molarity and II were described with high precision by second order polynomials for each of the PEGs studied. In contrast to previous reports, equivalent weights of different polymers in solution did not generate the same II; low Mr PEGs generated a higher II than the higher Mr PEGs. The effect of PEGs upon II represents an interaction between concentration and Mr.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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