GB/T 42998-2023 in English

《GB/T 42998-2023家具产品及其材料中禁限用物质测定方法 醛酮类化合物》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。

Foreword

ChinaStandards.net is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.

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.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The issuing body of this document shall not be held responsible for identifying any or all such patent rights.

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

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




Methods for the determination of prohibited substances in furniture products and related materials - Aldehydes and ketones

1 Scope

This document describes a high performance liquid chromatographic method for the determination of aldehydes and ketones in furniture products and related materials.

This document is applicable to the determination of aldehydes and ketones released from furniture products and related raw materials.

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 of the referenced document (including any amendments) applies.

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

3 Terms and definitions

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

3.1
aldehydes and ketones
all volatile organic compounds containing carbonyl groups released from furniture samples and detected in the air at the sampling port of the climate chamber
Note: Aldehydes and ketones include but are not limited to formaldehyde, acetaldehyde, acrolein, acetone, benzaldehyde, butyraldehyde, n-valeraldehyde, 2, 5-dimethylbenzaldehyde, butenal, isovaleraldehyde, propionaldehyde, hexanal, o-tolualdehyde, p-tolualdehyde, m-tolualdehyde, etc.

4 Principle

In order to simulate the loading state of furniture, the samples are placed in a climate chamber under certain conditions (temperature, relative humidity and air flow rate) according to the specified loading rate, and the aldehydes and ketones released from furniture samples are mixed with the air entering the climate chamber and discharged from the chamber outlet. Adsorbent 2, 4-dinitrophenylphenylhydrazine (DNPH) is used for capturing aldehydes and ketones in a certain volume of gas at the outlet of the climate chamber, and the release concentration of aldehydes and ketones captured is measured by analytical instruments. According to the release concentration, product loading rate and gas exchange rate, the release rate of aldehydes and ketones in furniture samples is calculated.

DNPH sampling tube actively collects a certain volume of outlet air of climate chamber, and the components of aldehydes and ketones in the outlet air react with DNPH of sampling tube to produce stable derivative compound 2, 4-dinitrophenylhydrazone, which is eluted with acetonitrile, separated by reversed-phase liquid chromatography column, determined by a high performance liquid chromatograph with ultraviolet detector or two-stage array tube detector, and quantified by the external standard method. See Figure 1 for the schematic diagram.

Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents or materials
6 Instruments and equipment
7 Test procedure
8 Test data processing
9 Precision and accuracy
10 Quality assurance and control
Annex A (Information) Typical aldehydes and ketones and related DNPH derivatives
Annex B (Informative) Limits of detection for this method and limits of determination