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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.


Общая информация 

  • Текущий статус
     : Опубликовано
    Дата публикации
     : 2018-12
  • Версия
     : 1
  • Технический комитет
     : ISO/TC 6 Paper, board and pulps
  • ICS
     :
    85.040 Pulps

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  • CHF124

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  2. Интернет-магазин
  3. Каталог стандартов
  4. МКС
  5. 85
  6. 85.040
  7. ISO 21400:2018