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GB/T 44571-2024: Test method of leatherette - Determination of free isocyanates content
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| GB/T 44571-2024 | English | 359 |
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Test method of leatherette - Determination of free isocyanates content
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GB/T 44571-2024
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Basic data | Standard ID | GB/T 44571-2024 (GB/T44571-2024) | | Description (Translated English) | Test method of leatherette - Determination of free isocyanates content | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | Y47 | | Classification of International Standard | 59.080.40 | | Word Count Estimation | 18,160 | | Date of Issue | 2024-09-29 | | Date of Implementation | 2025-04-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 44571-2024: Test method of leatherette - Determination of free isocyanates 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.
Test method of leatherette - Determination of free isocyanates content
Test methods for artificial leather and synthetic leather
Determination of free isocyanate content
ICS 59.080.40
CCS Y 47
National Standard of the People's Republic of China
Released on 2024-09-29
2025-04-01 Implementation
State Administration for Market Regulation
The National Standardization Administration issued
Table of Contents
Preface ... Ⅲ
1 Scope ... 1
2 Normative references ... 1
3 Terms and Definitions ... 1
4 Liquid chromatography (LC method) ... 1
4.1 Principle 1
4.2 Reagents and Materials 1
4.3 Instruments and Equipment 2
4.4 Test steps 2
5 Gas chromatography-mass spectrometry (GC-MS) ... 4
5.1 Principle ... 4
5.2 Reagents and Materials 4
5.3 Instruments and Equipment 4
5.4 Test steps 4
6 Gas chromatography (GC) ... 6
6.1 Principle 6
6.2 Reagents and Materials 6
6.3 Instruments and Equipment 6
6.4 Test steps 7
6.5 Determination of dicyclohexylmethane diisocyanate content 7
7 Detection Limit ... 8
8 Test Report ... 8
Appendix A (Informative) Liquid Chromatogram of Standard Isocyanate Derivatives ... 9
Appendix B (Normative) Ion Mode (SIM) Acquisition Parameters ... 10
Appendix C (Informative) Gas Chromatography-Mass Spectrometry Ion Mode (SIM) Monitoring Chart of Isocyanate Standard Solution ... 11
Appendix D (Informative) Gas Chromatogram of Isocyanate Standard Solution ... 12
Foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents"
Drafting is required.
Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.
This document was proposed by China Light Industry Federation.
This document is under the jurisdiction of the National Technical Committee for Standardization of Plastic Products (SAC/TC 48).
This document was drafted by. Zhejiang Hexin New Materials Co., Ltd., Jinlv Environmental Technology Co., Ltd., Jieshou Plastic Valley Renewable Resources Co., Ltd.
Co., Ltd., Anhui Amway Materials Technology Co., Ltd., Kunshan Achilles New Materials Technology Co., Ltd., Zhejiang Deep Blue New Materials Technology Co., Ltd.
Co., Ltd., Kunshan Xiefu New Materials Co., Ltd., Shandong Tongda Haidao New Materials Co., Ltd., Tenshou (Fujian) Microfiber Technology Co., Ltd.
Co., Ltd., Hubei Qili Polymer Materials Co., Ltd., Foshan Weisda New Materials Co., Ltd., Chongqing Shuangxiang Microfiber Materials Co., Ltd.,
Guangdong Tianan Polymer Technology Co., Ltd., Fujian Huaxia Synthetic Leather Co., Ltd., Zhejiang Meisheng New Materials Co., Ltd., Lishui Quality Inspection
Inspection Institute, Suzhou Ruigao New Materials Co., Ltd., Suzhou Best Decoration New Materials Co., Ltd., Zhejiang Luoxing Chemical Co., Ltd.
Company, Nantong Deyi New Materials Co., Ltd., Zhejiang Jiake New Materials Technology Co., Ltd., Dongguan Weiside Technology Development Co., Ltd.,
Hefei Ketian Water-based Technology Co., Ltd. and Shanghai Huafeng Testing Technology Co., Ltd.
The main drafters of this document are. Xu Yiyan, Yu Xiaojuan, Hong Bin, Huang Wanli, Xu Lili, Fan Xiaoying, Zhang Feng, Zhao Jianming, Li Xiangyu,
Xu Xuri, Zhou Wenzhi, Liu Aiming, Su Hongwei, Yang Wentao, Chen Runjiao, Qian Guochun, Chen Jun, Gao Jingang, Zhu Lihong, Yao Dusheng,
Chen Qiaojian, Zheng Sixian, Li Hualin, Zhang Wenfu, Zhu Youkui, Zhou Jing.
Test methods for artificial leather and synthetic leather
Determination of free isocyanate content
Warning - Personnel using this document should have practical experience in formal laboratory work. Isocyanates are classified as hazardous chemicals, Class 6.1, toxic
When handling, protective gloves, protective glasses and respiratory protection should be worn. This document does not address all possible safety issues.
It is the responsibility to take necessary safety and health measures and ensure that the conditions are met in accordance with relevant national regulations.
1 Scope
This document describes the liquid chromatography (LC) method, gas chromatography-mass spectrometry (GC-MS) method for the determination of free isocyanate content in artificial and synthetic leather.
There are three experimental methods. GC﹘MS method and gas chromatography (GC method).
This document applies to free isocyanates (1,4﹘phenylene isocyanate, toluene diisocyanate,
Hexamethylene diisocyanate, trimethyl hexamethylene diisocyanate, isophorone diisocyanate, diphenylmethane diisocyanate) content
Other isocyanates (such as dicyclohexylmethane diisocyanate) are also applicable to this document.
2 Normative references
The contents of the following documents constitute the essential clauses of this document through normative references in this document.
For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies.
in this document.
GB/T 6682 Specifications and test methods for water used in analytical laboratories
GB/T 8170 Rules for rounding off values and expression and determination of limit values
GB/T 34443 Terminology of artificial leather and synthetic leather
HG/T 6064-2022 4,4′﹘Dicyclohexylmethane diisocyanate
3 Terms and definitions
The terms and definitions defined in GB/T 34443 apply to this document.
4 Liquid chromatography (LC method)
4.1 Principle
The sample was extracted with dichloromethane by ultrasonic and then derivatized with 9﹘N﹘methylaminomethylanthracene. The derivatized product was determined by liquid chromatography.
Legal amount.
4.2 Reagents and materials
4.2.1 Unless otherwise specified, the following reagents are of analytical grade or above.
Water (H2O). Grade 1 water as specified in GB/T 6682; a)
Dichloromethane (CH2Cl2). Dry over 5A molecular sieve overnight and set aside; b)
Ether (C2H6O); c)
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