An improvement on wright's method for the micro-determination of molecular Weights

An improvement of WRIGHT'S method for the determination of molecular weights is described, in which the filterpapers, carrying the solutions, are handled and weighed in light aluminium rings, and equilibrium is reached inside a closely fitting aluminium box. There is a wide choice of appropriate solvents with boiling points ranging from 100–184°. The accuracy reached is 5–10%. The amount of substance required is about 1 mg.