道路车辆的内部空气 第10部分：整车试验室 车厢内部挥发性有机化合物的测定规范和方法 卡车和公共汽车

[中文适用范围]： 本文件描述并规范了整个车辆试验室、蒸汽采样装置和测定车内空气中挥发性有机化合物（VOCs）以及羰基化合物的操作条件。这些测量分为三种：在模拟环境条件（环境模式）下进行一次测量，其中不包括空气交换，温度为23°C；第二次仅用于甲醛的高温条件下（停车模式）测量；第三次用于模拟驾驶的高温条件下测量VOC和羰基化合物（驾驶模式）。使用固定辐照度模拟太阳辐射。该方法适用于非极性和弱极性VOCs在微克/立方米到数毫克/立方米浓度范围内的测定。某些半挥发性有机化合物（SVOC）也可以用相同原理进行分析。兼容的化合物是指能够从Tenax TA®吸附管中被捕获和释放的化合物，包括从n-C6到n-C16范围内的VOCs。使用高效液相色谱法（HPLC）结合紫外吸收检测器对甲醛和其他羰基化合物进行采样和分析。甲醛和其他羰基化合物可以在大约1 μg/m³到1 mg/m³的浓度范围内被测定。该方法适用于根据ISO 3833:1977中定义的卡车和公共汽车。 [外文原描述]： This document describes and specifies the whole vehicle test chamber, the vapour sampling assembly and the operating conditions for the determination of volatile organic compounds (VOCs; for more information see Annex E), and carbonyl compounds in vehicle cabin air. There are three measurements performed: one (for VOCs and carbonyl compounds) during the simulation of ambient conditions (ambient mode) at standard conditions of 23 °C with no air exchange; a second only for the measurement of formaldehyde at elevated temperatures (parking mode); and a third for VOCs and carbonyl compounds simulating driving after the vehicle has been parked in the sun starting at elevated temperatures (driving mode). For the simulation of the mean sun irradiation, fixed irradiation in the whole vehicle test chamber is employed. The VOC method is valid for measurement of non-polar and slightly polar VOCs in a concentration range of sub-micrograms per cubic metre up to several milligrams per cubic metre. Using the principles described in this method, some semi-volatile organic compounds (SVOC) can also be analysed. Compatible compounds are those which can be trapped and released from the Tenax TA ® 1) sorbent tubes described in ISO 16000‑6, which includes VOCs ranging in volatility from n -C6 to n -C16. The sampling and analysis procedure for formaldehyde and other carbonyl compounds is performed by collecting air on to cartridges coated with 2,4-dinitrophenylhydrazine (DNPH) and subsequent analysis by high performance liquid chromatography (HPLC) with detection by ultraviolet absorption. Formaldehyde and other carbonyl compounds can be determined in the approximate concentration range 1 μg/m 3 to 1 mg/m 3 . This method applicable to trucks and buses, as defined in ISO 3833:1977 3.1.1 to 3.1.6. This document describes: a) Transport and storage of the test vehicle until the start of the test. b) Conditioning of the surroundings of the test vehicle and the test vehicle itself as well as the whole vehicle test chamber. c) Conditioning of the test vehicle prior to measurements. d) Simulation of ambient air conditions (ambient mode). e) Formaldehyde sampling at elevated temperatures (parking mode). f) Simulation of driving after the test vehicle has been parked in the sun (driving mode). 1)Tenax TA ® is the trade name of a product supplied by Buchem. This information is given for the convenience of users of this document and does not constitute an endorsement by ISO of the product named. Equivalent products may be used if they can be shown to lead to the same results.