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ISO 21400:2018

Pulp - Determination of cellulose nanocrystal sulfur and sulfate half-ester content
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ISO 21400:2018

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

PUBLISH DATE 2018
ISO 21400:2018

This document 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.
SDO ISO: International Organization for Standardization
Document Number ISO 21400
Publication Date Dec. 1, 2018
Language en - English
Page Count
Revision Level
Supercedes
Committee ISO/TC 6
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