GB/T 40723-2021 English PDF

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GB/T 40723-2021: Rubber - Determination the contents of total sulfur and total nitrogen - Automatic analyser method
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 40723-2021	279	Add to Cart	3 days	Rubber - Determination the contents of total sulfur and total nitrogen - Automatic analyser method	Valid

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Basic data

Standard ID: GB/T 40723-2021 (GB/T40723-2021)
Description (Translated English): Rubber - Determination the contents of total sulfur and total nitrogen - Automatic analyser method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G40
Word Count Estimation: 14,165
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 40723-2021: Rubber - Determination the contents of total sulfur and total nitrogen - Automatic analyser method

---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.
Rubber - Determination the contents of total sulfur and total nitrogen - Automatic analyser method ICS 83.060 CCSG40 National Standards of People's Republic of China Determination of rubber total sulfur and total nitrogen content Automatic analyzer method (ISO 15671.2000,Rubberandrubberadditives-Determinationoftotalsulfur contentusinganautomaticanalyser;ISO 15672.2000,Rubberandrubber analyser,MOD) Released on 2021-10-11 and implemented on 2022-05-01 State Administration of Market Supervision and Administration Issued by the National Standardization Management Committee

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 of Standardization Documents" Drafting. This document uses the redrafting method to modify and adopt ISO 15671.2000 "Rubber and rubber additives using automatic analyzers to determine total sulfur content" Quantity" and ISO 15672.2000 "Determination of Total Nitrogen Content by Automatic Analyzer for Rubber and Rubber Additives". Compared with ISO 15671.2000 and ISO 15672.2000, this document has many adjustments in structure. The comparison table of the chapter numbers of ISO 15671.2000 and ISO 15672.2000. The main technical differences between this document and ISO 15671.2000 and ISO 15672.2000 and the reasons are as follows. ---Added a chapter "Normative Reference Documents" (see Chapter 2) for ease of use; ---The sample preparation method has been added to improve the operation steps (see 4.4, 5.4); --- Changed "total sulfur content precision data" to appendix B for ease of use (see appendix B); --- Changed the "total nitrogen content precision data" as Appendix C for ease of use (see Appendix C). This document has made the following editorial changes. ---The standard name has been changed, and the file name is unified as "Rubber Total Sulfur and Total Nitrogen Determination of Automatic Analyzer Method". Please note that some of the contents of this document may involve patents. The issuing agency of this document is not responsible for identifying patents. This document was proposed by the China Petroleum and Chemical Industry Federation. This document is organized by the General Test Methods Subcommittee of the National Rubber and Rubber Products Standardization Technical Committee (SAC/TC35/SC2) Focus. Drafting organizations of this document. Double Coin Group Shanghai Tire Research Institute Co., Ltd., Sailun Group Co., Ltd., Guizhou Tire Co., Ltd. Company, Shandong Linglong Tire Co., Ltd., Double Star Group Co., Ltd., Yiweiyi Rubber Research Institute Co., Ltd., Triangle Tire Co., Ltd. Co., Ltd., Shandong Huasheng Rubber Technology Co., Ltd., Fengshen Tire Co., Ltd., Beijing Rubber Tire Testing Technology Service Co., Ltd. Company, Beijing Rubber Industry Research and Design Institute Co., Ltd. The main drafters of this document. Dong Wenwu, Huang Zhongying, Hou Xiaoqian, Wang Dan, Jia Airi, Zhang Lijie, Guo Fei, Zhang Yanling, Ding Zhaojuan, Xu Yi, Yan Wenli, Xu Kai, Zhang Yuliang, Di Sheng, Zhao Jing, Cang Feifei, Niu Danwei, Ding Xiaoying. Determination of rubber total sulfur and total nitrogen content Automatic analyzer method Warning. The test personnel using this document should be familiar with the formal laboratory operating procedures. This document does not intend to All security issues that arise. Users are responsible for formulating corresponding safety and health systems and ensuring compliance with national laws and regulations. Note. The procedures specified in the use document may involve the use or production of some substances, and some waste may be generated. This may lead to Local environmental hazards should be handled and disposed of safely by referring to the corresponding documents after use.

1 Scope

This document describes the method to determine the total sulfur content (method A) and total nitrogen content (method B) in rubber using the automatic analyzer method. This document is applicable to the determination of total sulfur and total nitrogen content in rubber. Note. When determining the total sulfur content in rubber, it will be affected by the sulfur content of accelerators, antioxidants and other additives. The final measurement result is lower than the actual sulfur content added. The amount is high.

2 Normative references

The contents of the following documents constitute the indispensable clauses of this document through normative references in the text. Among them, dated quotations Only the version corresponding to that date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to This document. GB/T 15340 Natural and synthetic raw rubber sampling and sample preparation method (GB/T 15340-2008, ISO 1795.2000, IDT) GB/T 17783 Preparation of chemical test samples and test specimens for vulcanized rubber or thermoplastic rubber (GB/T 17783-2019, ISO 4661-2.2018, MOD)

3 Terms and definitions

The following terms and definitions apply to this document. 3.1 Sample Select the part that represents the entire material for analysis. 3.2 Sample testportion Used as the actual material for analysis. 3.3 Controlsample Samples with known total nitrogen or total sulfur content. Note. Analyze simultaneously with the sample. ......

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