SSH EN ISO 10927:2011

Plastikë - Përcaktimi i masës molekulare dhe shpërndarjes së masës molekulare të polimerëve të ndryshëm në procesin e desorbim/jonizimit me lazer, nëpërmjet kohës të rritjes së masës me spektrometri(MALDI-TOF-MS) (ISO 10927:2011)

Plastics - Determination of the molecular mass and molecular mass distribution of polymer species by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS) (ISO 10927:2011)

Scope

ISO 10927:2011 specifies a general method for determining the average molecular mass and molecular mass distribution of polymers from 2 000 g.mol-1 to 20 000 g.mol-1 by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI‑TOF‑MS).
The average molecular masses and molecular mass distributions are calculated from a calibration curve constructed using synthetic-polymer and/or biopolymer standards. This method is therefore classified as a relative method.
The method is not applicable to polyolefins or to polymers with a polydispersity > 1,2.