Reference number
ISO 21400:2018
International Standard
ISO 21400:2018
Pulp — Determination of cellulose nanocrystal sulfur and sulfate half-ester content
Edition 1
2018-12
Read sample
ISO 21400:2018
70861
Published (Edition 1, 2018)

ISO 21400:2018

ISO 21400:2018
70861
Language
Format
CHF 129
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Abstract

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

  •  : Published
     : 2018-12
    : Close of review [90.60]
  •  : 1
     : 26
  • ISO/TC 6
    85.040 
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