Temperature Rising Elution Fractionation (TREF) is a well known technique for the characterization of the Chemical Composition Distribution (CCD) in Polyolefins and Polymer Char’s TREF is the first fully automated analytical Instrument that performs this analysis.

The concentration of the sample is measured by an infrared detector (Polymer Char’s IR4), which can also offer information about comonomer content if a composition sensor is added. More information can be obtained by adding Viscometer and/or Light Scattering detectors.