Molecular weight of polymers with GPC/SEC-RI

Gel permeation chromatography (GPC), a.k.a. size exclusion chromatography (SEC), of polymers using a refractive index (RI) detector.

This technique will measure the molecular weight distribution of polymer samples in a graphical format, the dispersity, Đ, and determine the molecular weight averages, Mn, Mw, Mz, relative to an existing standard.

Please note that the numerical values determined for molecular weight by the RI method are not absolute. GPC/SEC-RI is most commonly used to analyze the graphical distribution or dispersity of a polymer.

If you need an absolute determination of your sample's true molecular weight, please see our GPC/SEC-MALS method.

Samples must be soluble or capable of being analyzed in solution at room temperature. The type of polymer and the necessary solvent will affect the cost of the measurement. Please contact our experts for a tailored quote.