标准摘要
[中文适用范围]： 本文件规定了分别通过电感耦合等离子体发射光谱法和电导滴定法测定纤维素纳米晶体（CNC）的总元素硫和硫酸盐半酯含量的实验室程序，包括样品制备、测量方法和数据分析。 本文件适用于 CNC 的表征： a) 所有单价抗衡离子（特别是水合氢离子和钠阳离子）； b) 在水悬浮液中处于未干燥状态，或已从干燥形式再分散； c) 使用一系列硫酸水解条件从任何天然存在的纤维素源中提取的，或使用硫酸水解后硫酸化的。 [外文原描述]： 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.
英文名称Pulp — Determination of cellulose nanocrystal sulfur and sulfate half-ester content