GB/T 43012-2023 Active National standards

GB/T 43012-2023 Pulp—Determination of cellulose nanocrystal sulfur and sulfate half-ester content

Publish Date: 2023-09-07 Implement Date: 2024-04-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

Basic Information

Standard Code: GB/T 43012-2023

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Paper making

ICS Name: \nPulp

Publish Date: 2023-09-07

Implement Date: 2024-04-01

Pages: 20 pages

Scope

This document describes the steps for determining the sulfur and sulfate ester content in cellulose nanocrystals (CNCs) in the laboratory using inductively coupled plasma optical emission spectrometry (ICP-OES) and conductometric titration, respectively.
This document is applicable to the following types of cellulose nanocrystals:
a) with monovalent counterions (especially hydrated hydrogen ions and sodium ions);
b) undried or redispersed from a dried state to form a dispersion solution;
c) obtained from natural cellulose raw materials through sulfuric acid hydrolysis or hydrolysis followed by sulfuric acid acidification.