ISO 21400:2018 纸浆 纤维素纳米晶硫和硫酸盐半酯含量的测定

标准编号：ISO 21400:2018

中文名称：纸浆 纤维素纳米晶硫和硫酸盐半酯含量的测定

英文名称：Pulp — Determination of cellulose nanocrystal sulfur and sulfate half-ester content

发布日期：2018-12

标准范围

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.

标准预览图