osmometry การใช้

• Osmometry is also useful in determining the molecular weight of unknown compounds and polymers.
• "' Osmometry "'is the measurement of the osmotic strength of a substance.
• The main disadvantage of static osmometry is the long time it takes for equilibrium to be reached.
• Membrane osmometry measurements are best used for 30, 000 1, 000, 000 grams / mole.
• For instance, osmometry measures number average molar mass and small-angle laser viscosimetry and M z by sedimentation in an analytical ultra-centrifuge.
• Vapor phase osmometry is well suited for the analysis of oligomers and short polymers while higher polymers can be analyzed using other techniques such as membrane osmometry and light scattering.
• Vapor phase osmometry is well suited for the analysis of oligomers and short polymers while higher polymers can be analyzed using other techniques such as membrane osmometry and light scattering.
• The number average molecular mass of a polymer can be determined by gel permeation chromatography, viscometry via the ( Mark Houwink equation ), colligative methods such as vapor pressure osmometry, end-group determination or proton NMR.