GB/T 40971-2021 in English

《GB/T 40971-2021家具产品及其材料中禁限用物质测定方法 多环芳烃》由TC480（全国家具标准化技术委员会）归口，主管部门为中国轻工业联合会。

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This document is developed in accordance with the rules given in GB/T 1.1-2020 Directives for standardization - Part 1: Rules for the structure and drafting of standardizing documents.

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This standard was proposed by the China National Light Industry Council.

This standard is under the jurisdiction of the National Technical Committee 480 on Furniture of Standardization Administration of China (SAC/TC 480).


Methods for the determination of prohibited substance in furniture products and related materials - Polycyclic aromatic hydrocarbons

WARNING — Persons using this document should be familiar with normal laboratory practice. This document does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user to establish appropriate safety and health practices and to ensure compliance with any national regulatory conditions.

1 Scope

This document describes the gas chromatography-mass spectrometry (GC-MS) determination method for 18 varieties of polycyclic aromatic hydrocarbons (PAHs) in furniture products and related materials.

This document is applicable to the determination of 18 varieties of PAHs in furniture products and related materials.

2 Normative references

No normative reference is listed in this document.

3 Terms and definitions

For the purposes of this document, the following terms and definitions apply.

3.1
polycyclic aromatic hydrocarbons; PAHs
a series of hydrocarbon compounds and their derivatives fused by two or more benzene rings on which there may also be short alkyl or cycloalkyl substituents

Notes: See Table A.1 in Annex A for the 18 varieties of PAHs.

4 Principle

The specimen is subjected to ultrasonic extraction with toluene, purified by silica solid phase extraction column, and then concentrated to volume. After that, it is determined by gas chromatography-mass spectrometry (GC-MS) and quantified by external standard method in the selective ion monitoring mode.

5 Reagents or materials

5.1 n-Hexane: chromatographically pure.

5.2 Petroleum ether: chromatographically pure.

5.3 Methylbenzene: chromatographically pure.

5.4 Nitrogen: with a purity of 99.99% or better.

5.5 Helium: with a purity of 99.999% or better.

5.6 Reference materials of 18 varieties of PAHs: with a purity of 98% or better; or certified mixed standard solution of the 18 varieties of PAHs with their concentrations known.

5.7 Mixed standard working solution of the 18 varieties of PAHs: at least 5 calibration points, covering samples with a concentration ranging from 0.2 mg/kg to 10 mg/kg. That is, the concentration of the standard solution ranges from 10 ng/mL to 500 ng/Ml. This mixed standard working solution of PAHs shall be sealed and stored in a place away from light at 0℃~4℃.

5.8 Silica solid phase extraction column: 2g/10 mL or equivalent, soaked with n-hexane before use.

5.9 Centrifuge tube.

5.10 Sample bottle: about 50 mL in volume, provided with a cover for seal.

5.11 Membrane: organic syringe membrane, with an aperture of 0.45 μm.

Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents or materials
6 Apparatus
7 Samples
8 Test procedure
9 Test data processing
10 Precision
Annex A (Informative) Molecular formula, CAS No. and characteristic fragment ions of 18 varieties of PAHs
Annex B (Informative) Typical GC-MS selective ion chromatograms of 18 varieties of PAHs