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GB/T 40904-2021 English PDF

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GB/T 40904-2021: Methods for the determination of prohibited substances in furniture products and related materials - Azo dyes
Status: Valid

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
GB/T 40904-2021	English	199	Add to Cart	3 days [Need to translate]	Methods for the determination of prohibited substances in furniture products and related materials - Azo dyes	Valid	GB/T 40904-2021

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Basic data

Standard ID	GB/T 40904-2021 (GB/T40904-2021)
Description (Translated English)	Methods for the determination of prohibited substances in furniture products and related materials - Azo dyes
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	Y80
Word Count Estimation	10,170
Issuing agency(ies)	State Administration for Market Regulation, China National Standardization Administration

GB/T 40904-2021: Methods for the determination of prohibited substances in furniture products and related materials - Azo dyes

---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.
Methods for the determination of prohibited substances in furniture products and related materials - Azo dyes ICS 97.140 CCSY80 National Standards of People's Republic of China Method for determination of prohibited and restricted substances in furniture products and materials Azo dyes Released on 2021-10-11 2022-05-01 implementation 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. 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 National Light Industry Council. This document is under the jurisdiction of the National Furniture Standardization Technical Committee (SAC/TC480). Drafting organizations of this document. Guangdong Product Quality Supervision and Inspection Institute, Foshan Nanhai Xinda Gofan Industrial Co., Ltd., Shanghai Quality Supervision and Inspection Technology Research Institute, Guangzhou Hongming Hospital Special Furniture Co., Ltd., Guangdong Hongye Furniture Manufacturing Co., Ltd., Anji Deka Office System Co., Ltd., Xiamen Minghongtang Arts & Crafts Co., Ltd., Zhejiang Meisheng Smart Home Co., Ltd. The main drafters of this document. Tang Suiping, Hai Lingchao, Si Yinping, Lin Xiaorong, He Guangjing, Xie Mingjun, Zhou Hong, Wang Li, Meng Zhenlin, Huang Can, Tu Chunsheng. Method for determination of prohibited and restricted substances in furniture products and materials Azo dyes Warning---The personnel using this document should have practical experience in formal laboratory work. Aromatic amines have been classified as known or suspected to be human For substances like carcinogens, this document does not point out all possible safety issues. The user is responsible for taking appropriate safety and health measures, and Ensure compliance with the conditions stipulated by relevant national laws and regulations.

1 Scope

This document describes the determination methods for 24 banned azo dyes in furniture products and materials. This document is applicable to the determination of 24 prohibited azo dyes in furniture products and their materials.

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 6682 Analytical laboratory water specifications and test methods

3 Terms and definitions

There are no terms and definitions that need to be defined in this document.

4 Principle

In the citrate buffer, the azo dye in the sample is reduced by sodium dithionite to the corresponding aromatic amine intermediate. Diatomaceous earth Column liquid-liquid extraction, the aromatic amine produced by reduction cracking is extracted into tert-butyl methyl ether, and after concentration, it is dissolved in a suitable solvent and fixed to volume for gas Gas chromatography-mass spectrometry analysis. If necessary, choose another one or more methods to confirm the isomer.

5 Reagents or materials

The test water should conform to the third grade water specified in GB/T 6682. 5.1 Methanol, chromatographically pure. 5.2 n-hexane, chromatographically pure. 5.3 Ethyl acetate, chromatographically pure. 5.4 Tert-butyl methyl ether, chromatographically pure. 5.5 Citrate buffer, 0.06mol/L, pH=6, preheated to (70±5)℃. Take 12.526g citric acid and 6.320g hydroxide Sodium, dissolved in water, dilute to 1000mL. 5.6 Sodium dithionite, purity ≥87%. 5.7 Aqueous sodium dithionite solution,.200mg/mL. Take 10g of sodium dithionite (5.6) dissolved in water and dilute to 50mL. In airtight

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