Norm

NEN-ISO 21400:2019 en

Pulp - Determination of cellulose nanocrystal sulfur and sulfate half-ester content

107,78 130,41 Incl BTW

Over deze norm

Status Definitief
Aantal pagina's 26
Gepubliceerd op 01-01-2019
Taal Engels
NEN-ISO 21400 specifies procedures for the laboratory determination of the total elemental sulfur and the sulfate half-ester content of cellulose nanocrystals (CNCs) by inductively coupled plasma-optical emission spectroscopy and conductometric titration, respectively, including sample preparation, measurement methods and data analysis. This document is applicable to the characterization of CNCs: a) with all monovalent counterions (particularly hydronium and sodium cations); b) which are either in the never-dried state in aqueous suspension, or have been redispersed from a dried form; and c) which have been extracted from any naturally occurring cellulose source using a range of sulfuric acid hydrolysis conditions, or have been sulfated post-hydrolysis using sulfuric acid.

Details

ICS-code 85.040
Engelse titel Pulp - Determination of cellulose nanocrystal sulfur and sulfate half-ester content

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