Standard No.:	GB/T 42704-2023
English Name:	Textile trim materials in automotive interior applications—Determination of the emissions of volatile organic compounds—Chamber method
Chinese Name:	汽车内饰用纺织材料 挥发性有机物的测定 箱体法
Chinese Classification:	W04    Basic standards and general methods
Professional Classification:	GB    National Standard
ICS Classification:	59.080.30 59.080.30    Textile fabrics 59.080.30
Source Content Issued by:	SAMR; SAC
Issued on:	2023-05-23
Implemented on:	2023-12-1
Status:	valid
Target Language:	English
File Format:	PDF
Word Count:	8500 words
Translation Price(USD):	255.0
Delivery:	via email in 1~3 business day

Textile trim materials in automotive interior applications - Determination of the emissions of volatile organic compounds - Chamber method 1 Scope This document describes a test method for collecting and determining the emissions of volatile organic compounds from textile trim materials for automotive interiors by the chamber method. This document is applicable to all types of textile trim materials in automotive interior applications, including woven fabrics, knitted fabrics, nonwovens and coated fabrics, and composite fabrics. 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. HJ/T 400-2007 Determination of volatile organic compounds and carbonyl compounds in cabin of vehicles 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 total volatile organic compounds; TVOC volatile organic compounds with retention time between n-hexane and n-hexadecane when sampled by Tenax tube and analyzed with a non-polar column (polarity index: <10) 3.2 total hydrocarbon mass concentration quotient obtained by dividing the sum of the masses of all gaseous hydrocarbons measured using a hydrogen flame ionization detector (FID) by the volume of the dry gas at a specified pressure and temperature 3.3 volatile organic compounds; VOC organic compounds released from samples that can be detected in the outlet gas of the test chamber 3.4 test chamber equipment that can simulate specific temperature and humidity conditions, can be sealed, and is used for collecting volatile organic compounds from textile trim materials in automotive interior 3.5 air change rate ratio of air intake to chamber capacity in unit time 3.6 airflow speed average airflow speed produced by gas flow in the test chamber which is measured at the center of the chamber 3.7 chamber capacity effective volume of test space after deducting the volume of all installed devices in the test chamber 3.8 product loading factor ratio of the area exposed to the environment and the chamber volume when the product is actually used 3.9 Tenax tube glass or stainless-steel adsorption tube, inside which is filled with solid adsorption material with particle size of 250 μm ~ 180 μm (60 mesh ~ 80 mesh) Note: Tenax-TA tubes are usually used, and adsorption tubes with other packing can also be used. 3.10 DNPH tube sampling tube filled with 2,4-dinitrophenylhydrazine (DNPH) silicone gel 4 Principle Place the sample in the test chamber and heat it at the specified temperature, humidity, and gas exchange rate. Real time monitoring of the sampling environment is carried out using an online hydrogen flame ionization detector (FID). After a certain period of time, the gas inside the chamber is collected using a sampling tube. Qualitative and quantitative determination of the collected benzene series and aldehydes and ketones (see Annex A) is carried out using gas chromatography/mass spectrometry (GC-MS) and high-performance liquid chromatography (HPLC).

Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Principle ... ...