Determination of Molecular Weight

Abstract

An initial study, in which 23 collaborators participated, was conducted on the determination of molecular weight by the isothermal distillation (vapor pressure osmometry) method. Each used his own method and apparatus to analyze four samples in duplicate; the molecular weight ranged from 123 to 891. Results show that the chief problem is the choice of the correct solvent and reference standard and that the use of bare thermistors is questionable.