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Normas DIN – AENOR
DIN EN ISO 16014-5:2019-09

DIN EN ISO 16014-5:2019-09

Plastics - Determination of average molecular weight and molecular weight distribution of polymers using size-exclusion chromatography - Part 5: Light-scattering method (ISO 16014-5:2019); German version EN ISO 16014-5:2019

Plastiques - Détermination de la masse moléculaire moyenne et de la distribution des masses moléculaires de polymères par chromatographie d'exclusion stérique - Partie 5: Méthode par diffusion lumineuse (ISO 16014-5:2019); Version allemande EN ISO 16014-5:2019

Kunststoffe - Bestimmung der durchschnittlichen Molmasse und der Molmassenverteilung von Polymeren mittels Gelpermeationschromatographie - Teil 5: Lichtstreudetektionsverfahren (ISO 16014-5:2019); Deutsche Fassung EN ISO 16014-5:2019

Fecha:
2019-09 /Active
Equivalencias internacionales:

EN ISO 16014-5 (2019-06)

ISO 16014-5 (2019-05)

Relación con otras normas DIN:
Resumen:
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.
Keywords:
Calibration, Chromatography, Definitions, Detectors (circuits), Distribution of mass, Elution, Gel permeation chromatography, Light divergence, Molar mass, Molecular mass, Molecular weight, Plastics, Polymers, Quality control, Sampling methods, Specimen preparation
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