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GB/T 43720-2024Leather and fur - Chemical test - Determination of flame retardants (English PDF)

皮革和毛皮化学试验阻燃剂的测定

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

March 15, 2024

Implementation date

October 1, 2024

Scope

GB/T 43720-2024 is the English-translated version of 皮革和毛皮化学试验阻燃剂的测定.

China's national method for determining flame retardants in leather and fur.

Flame retardants are applied to leather used in furniture, vehicle interiors and protective clothing, and the class has been under sustained regulatory pressure: the brominated compounds that dominated it are persistent, bioaccumulative and in several cases restricted internationally, and their replacements have not always proved better.

Leather is a particular case because it is a protein material worn or sat on for long periods, in warm contact with skin, and because the retardant is applied as a surface finish rather than incorporated - so it can migrate out.

Determining which compounds are present and at what level is therefore both a regulatory compliance measurement and a due diligence one for a manufacturer who has specified a treated leather without knowing exactly what the treatment was.

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Document preview — GB/T 43720-2024

National Standard of the People's Republic of China

ICS: 59.140.30
Classification: Y 46

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

1 Scope
2 Normative references
3 Terms and definitions
4 GC-MS - Method A
5 LC-MS/MS - Method B
6 Test report

Foreword

GB/T 43720-2024 | Leather and fur - Chemical test - Determination of fire retardants

46 National Standards of People's Republic of China Chemical testing of leather and fur - Determination of flame retardants Released on 2024-03-15 2024-10-

01 Implementation State Administration for Market Regulation The National Standardization Administration issued

1 Scope

This document describes the test methods for the determination of fire retardants in leather and fur by GC-MS and LC-MS/MS.

This document is applicable to the determination of 29 fire retardants (see Annex A) in leather and fur and their products.

2 Normative references

The following documents contain requirements which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.

GB/T 6682 Water for analytical laboratory use - Specification and test methods

GB/T 39364 Leather - Chemical, physical, mechanical and fastness tests - Sampling location QB/T 1267 Fur - Chemical, physical and mechanical and fastness tests - Sampling location QB/T 1272 Fur - Preparation of chemical test samples QB/T 2716 Leather - Preparation of chemical test samples

3 Terms and definitions

No terms and definitions are listed in this document.

4.1 Principles

Ultrasonic extraction is carried out with the mixture of dichloromethane and n-hexane, after the extraction solution is purified by C18 solid phase extraction column, it is separated and determined by GC-MS method and quantified by internal standard method.

This method is applicable to the determination of 10 polybrominated biphenyls and 10 Poly Brominated Diphenyl Ethers fire retardants (see Table A.1) in leather and fur.

4.2 Reagents and materials

4.2.1 Unless otherwise specified, analytical grade reagents shall be used.

4.2.2 Dichloromethane, chromatographically pure.

4.2.3 N-hexane: chromatographically pure.

4.2.4 Mixed solution of dichloromethane and n-hexane: dichloromethane (4.2.2) and n-hexane (4.2.3) are mixed with equal volume;

4.2.5 Fire retardant standards are detailed in Table A.1.

4.2.6 Decachlorobiphenyl (internal standard), prepared with n-hexane (4.2.3) in appropriate concentrations as required.

4.2.7 Mixed standard solution: accurately weigh an appropriate amount of each fire retardant standard product (4.2.5, accurate to 0.01mg), dissolve it with n-hexane (4.2.3) and prepare a mixed standard solution of a certain concentration (including internal standards).

Contents of GB/T 43720-2024 Contents Foreword I

6 Test report

Annex A (Informative) Chinese and English names, abbreviations, relative molecular mass and CAS No. of fire retardant standards

Annex B (Informative) GC-MS reference conditions and quantitative limits of fire retardant standards and internal standards

Annex C (Informative) SIM figure of target compound

Annex D (Informative) MRM figure of target compound

Referred in GB/T 43720-2024:

GB/T 6682-2008 Water for analytical laboratory use - Specification and test methods *

GB/T 39364-2020 Leather—Chemical,physical,mechanical and fastness tests—Sampling location *

QB/T 1267-2012 Fur - Chemical|| physical and mechanical and fastness tests - Sampling location *

QB/T 1272-2012 Leather - Chemical tests - Preparation of chemical test samples *

QB/T 2716-2018 Leather -- Preparation of chemical test samples padding: 6px;

color: rgb(153, 153, 153);

background-color: rgb(248, 248, 248);

border-bottom: 1px solid rgb(153, 153, 153);

GB/T 43720-2024 Leather and fur—Chemical test—Determination of fire retardants (English) Standard No.

Translation Price(USD) 255.0 Implemented on 2024-10-1 Delivery

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Detail of GB/T 43720-2024 Standard No.

6 Test report

Annex A (Informative) Chinese and English names, abbreviations, relative molecular mass and CAS No. of fire retardant standards

Annex B (Informative) GC-MS reference conditions and quantitative limits of fire retardant standards and internal standards

Annex C (Informative) SIM figure of target compound

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

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