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ISO 21400:2018

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

Standard Details

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.

General Information

Status : Published
Standard Type: Main
Document No: ISO 21400:2018
Document Year: 2018
Pages: 26
Edition: 1
  • Section Volume:
  • ISO/TC 6. Paper, board and pulps

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ISO 21400:2018
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