DIN EN ISO 16014-5:2012-10

This standard specifies a general method for determining the average molecular mass and the molecular mass distribution of polymers using SEC LS, i.e. size-exclusion chromatography coupled with light-scattering detection. The average molecular mass and the molecular mass distribution are calculated from molecular mass data and mass concentrations determined continuously with elution time. The molecular mass at each elution time is determined absolutely by combining a light-scattering detector with a concentration-sensitive detector. Therefore, SEC LS is classified as an absolute method.