Active standard | Published: 18/12/2018

ISO 21400:2018

Pulp — Determination of cellulose nanocrystal sulfur and sulfate half-ester content
(Pâte — Détermination de la teneur en soufre et en demi-ester de sulfate des nanocristaux de cellulose)

Available languages: English

Available design: electronic design (pdf), Print design

from 173.30 EUR show on eshop

Detail information

Designation: ISO 21400:2018

Publication date: 18/12/2018

Pages: 26

Country: International technical standard

Where to buy?

You can buy at www.mystandards.biz

Anotation

Description / 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.

Popular Publishers

full catalog