环境空气 总(气相和颗粒物相)多环芳烃的测定 吸附剂吸收色质联机法

[中文适用范围]： 本国际标准规定了测定环境空气中多环芳烃（PAH）的采样、净化和分析程序。 它旨在收集气相和颗粒相 PAH，并对其进行集中测定。 它是一种大容量（100 l/min 至 250 l/min）方法，能够检测 0.05 ng/m 或更低浓度的 PAH，采样体积可达 350 m。 该方法已在长达 24 小时的采样周期内得到验证。 正常条件下的精密度预计为 ±25% 或更好，不确定度为 ±50% 或更好（见附件 A，表 A.1）。 本国际标准描述了 PAH 的采样和分析程序，包括通过细颗粒过滤器和吸附剂捕集器组合从空气中收集，然后通过气相色谱/质谱 (GC/MS) 进行分析。 [外文原描述]： This International Standard specifies sampling, cleanup and analysis procedures for the determination of polycyclic aromatic hydrocarbons (PAH) in ambient air. It is designed to collect both gas-phase and particulate-phase PAH and to determine them collectively. It is a high-volume (100 l/min to 250 l/min) method capable of detecting 0,05 ng/m3 or lower concentrations of PAH with sampling volumes up to 350 m3. The method has been validated for sampling periods up to 24 h. Precision under normal conditions can be expected to be _ 25 % or better and uncertainty _ 50 % or better (see annex A, Table A.1). This International Standard describes a procedure for sampling and analysis for PAH that involves collection from air on a combination fine-particle filter and sorbent trap, and subsequent analysis by gas chromatography/mass spectrometry (GC/MS).