SSH EN ISO 16014-5:2012

Plastikë - Përcaktimi i masës mesatare molekulare dhe shpërndarja e masës molekulare të polimerëve duke përdorur përjashtimin e përmasave me anë të kromatografisë - Pjesa 5: Metoda duke përdorur përhapjen e dritës (ISO 16014-5:2012)

Plastics - Determination of average molecular mass and molecular mass distribution of polymers using size-exclusion chromatography - Part 5: Method using light-scattering detection (ISO 16014-5:2012)

Scope

The standard specifies a general method for determining the average molecular mass and molecular mass distribution of polymers from using SEC-LS, i.e. size-exclusion chromatography (SEC) coupled with light scattering detection (LS). The average molecular mass and the molecular mass distribution are calculated from data of molecular mass and mass concentration determined continuously at eacht elution time. The molecular mass at each elution time is determined absolutely by combining a light scattering detector with a concentration-sensitive detector. Therefore this method is classified as an absolute method (see Clause A.1 in Annes A).