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
Preview
ISO 21400:2018
70861
Indisponible en français
Publiée (Edition 1, 2018)

ISO 21400:2018

ISO 21400:2018
70861
Langue
Format
CHF 129
Convertir les francs suisses (CHF) dans une autre devise

Résumé

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.

Informations générales

  •  : Publiée
     : 2018-12
    : Clôture de l'examen [90.60]
  •  : 1
  • ISO/TC 6
    85.040 
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