Aktívna norma | Vydaná: 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)

Dostupné jazyky: Anglicky

Dostupné prevedenie: Elektronické PDF, Tlačené

od 4 205.20 CZK zobraziť na eshopu

Podrobné informácie

Označenie: ISO 21400:2018

Dátum vydania: 18.12.2018

Stránok: 26

Krajina: Medzinárodná technická norma

Kde kúpiť?

Môžete zakúpiť na eshop.normservis.sk

Anotácia

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.

Populárna vydavatelia

celý katalóg