GB/T 43012-2023 English PDF

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

Standard ID: GB/T 43012-2023 (GB/T43012-2023)
Description (Translated English): Pulp - Determination of cellulose nanocrystal sulfur and sulfate half-ester content
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: Y30
Classification of International Standard: 85.040
Word Count Estimation: 22,299
Date of Issue: 2023-09-07
Date of Implementation: 2024-04-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

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

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 85.040 CCSY30 National Standards of People's Republic of China Sulfur in pulp cellulose nanocrystals and Determination of sulfate half ester content (ISO 21400.2018,MOD) Published on 2023-09-07 2024-04-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration Committee

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents" Drafting. This document is modified to adopt ISO 21400.2018 "Determination of sulfur element and sulfate half-ester content in pulp cellulose nanocrystals". The technical differences between this document and ISO 21400.2018 and their reasons are as follows. ---Replaced ISO /T S80004-1 (see Chapter 3) with the normatively quoted GB/T 30544.1 to adapt to my country's technical conditions; ---Replaced ISO /T S80004-6 (see Chapter 3) with the normatively quoted GB/T 30544.6 to adapt to my country's technical conditions; ---Replaced ISO 3696 (see 5.2.1, 6.2.1, A.1.1) with normatively quoted GB/T 6682 to adapt to my country's technology condition; ---Replaced ISO 14644-1 (see A.1.7) with the normatively cited GB/T 25915.1 to adapt to my country's technical conditions. Please note that some content in this document may be subject to patents. The publisher of this document assumes no responsibility for identifying patents. This document is proposed by China Light Industry Federation. This document is under the jurisdiction of the National Paper Industry Standardization Technical Committee (SAC/TC141). This document was drafted by. Tianjin University of Science and Technology, Zhejiang Jinjiahao Green Nanomaterials Co., Ltd., Zhejiang Jingxing Paper Co., Ltd. Company, Zhejiang Shunpu New Material Technology Co., Ltd., Xiamen Xinxinguang Plastic Packaging Co., Ltd., Chongqing Kaicheng Technology Co., Ltd., China Pulp Paper Research Institute Co., Ltd., Zhongqing Paper Products Inspection and Certification Co., Ltd., and National Paper Quality Inspection and Testing Center. The main drafters of this document. Liu Hongbin, Liu Yingying, Zhang Meng, Hua Feiguo, Meng Yu, Cao Haibing, Liu Liqin, Jiang Feng, Huang Xiaoqing, Liu Linhui, Wang Xinting, Yuan Taojing. Sulfur in pulp cellulose nanocrystals and Determination of sulfate half ester content Warning---Personnel using this document should have practical experience in regular chemical laboratory work. This document does not address all possible safety All questions. Users are responsible for taking appropriate safety and health measures and ensuring compliance with the conditions stipulated in relevant national regulations.

1 Scope

This document describes the laboratory determination of fibers by inductively coupled plasma optical emission spectroscopy (ICP-OES) and conductometric titration, respectively. Steps to determine the content of elemental sulfur and sulfate half-ester in plain nanocrystals (CNCs). This document applies to the following types of cellulose nanocrystals. a) With monovalent counterions (especially hydronium ions and sodium ions); b) Dispersions that have not been dried or are redispersed from a dry state; c) It is obtained by hydrolyzing cellulose raw materials in nature through sulfuric acid or hydrolyzing and then acidifying with sulfuric acid.

2 Normative reference documents

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document. GB/T 6682 Analytical laboratory water specifications and test methods (GB/T 6682-2008, ISO 3696.1987, MOD) GB/T 25915.1 Clean rooms and related controlled environments Part 1.Classification of air cleanliness levels according to particle concentration (GB/T 25915.1-2021,ISO 14644-1.2015, MOD) GB/T 30544.1 Nanotechnology terminology Part 1.Core terms (GB/T 30544.1-2014, ISO /T S80004-1. 2010,IDT) GB/T 30544.6 Nanotechnology terminology Part 6.Characterization of nano-objects (GB/T 30544.6-2016, ISO /T S80004-6.2013, MOD) ISO /T S80004-2 Nanotechnology Vocabulary Part 2.Nanotechnologies-Vocabulary- Part 2.Nano-objects)

3 Terms and definitions

The following terms and definitions as defined in GB/T 30544.1, GB/T 30544.6 and ISO /T S80004-2 apply to this document. 3.1 nanoscale In the size range between 1nm and 100nm. Note. This size range generally, but not exclusively, exhibits characteristics that cannot be extrapolated from larger sizes. [Source. GB/T 30544.1-2014,2.1] 3.2 nano-object nano-object Materials whose one, two or three external dimensions are at the nanometer scale (3.1). ......

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