环境空气.高效液相色谱分析法测定粒相多环芳香烃

[中文适用范围]： 本国际标准规定了定量测定环境空气中低挥发性（颗粒结合）多环芳烃（PAH）的采样、净化和分析程序。 对于采样，可以使用低容量或中/高容量采样装置。 采样时间可以在 1 小时到 24 小时之间。 采样体积流速的范围可以为1m/h至4m/h(“低容量采样器”)或10m/h至约90m/h(“中/高容量采样器”)。 在任何情况下，收集过滤器处的线面速度应在约 0.5 m/s 和 0.9 m/s 之间。 该方法已在长达 24 小时的采样周期内得到验证。 单一 PAH 的检测限和重复测量产生的标准偏差分别列于 9.2 和附录 D。 本国际标准描述了 PAH 的采样和分析程序，包括从空气中收集到过滤器上，然后使用通常带有荧光检测器 (FLD) 的高效液相色谱进行分析。 可以使用二极管阵列检测器（DAD）。 两种探测器类型的组合也是可能的（参见附录 B）。 对总悬浮颗粒物进行采样。 通常，沸点高于430℃（25℃时蒸气压小于10kPa，例如苯、苯并[a]蒽）的化合物可以在低环境温度（例如低于10℃）下在过滤器上有效收集。 相反，在较高温度下（高于30℃，另见ISO 12884），仅对沸点高于475℃（25℃时蒸气压小于10kPa）的PAH进行定量测定（见附录F）。 [外文原描述]： ISO 16362:2005 specifies sampling, cleanup and analysis procedures for the quantitative determination of low volatility (particle-bound) polycyclic aromatic hydrocarbons (PAHs) in ambient air. For sampling, a low-volume or a medium/high-volume sampling device may be used. Sampling times between 1 h and 24 h are possible. The sampling volume flow rates can range from 1 m/h to 4 m/h ("low volume sampler") or from 10 m/h to about 90 m/h ("medium/high-volume sampler"). In any case, the linear face velocity at the collection filter should range between about 0,5 m/s and 0,9 m/s. The method has been validated for sampling periods up to 24 h. The detection limits for single PAHs and the standard deviations resulting from duplicate measurements are listed. ISo 16362:2005 describes a sampling and analysis procedure for PAH that involves collection from air onto a filter followed by analysis using high performance liquid chromatography usually with fluorescence detector (FLD). The use of a diode array detector (DAD) is possible. The combination of both detector types is also possible. Total suspended particulate matter is sampled. Generally, compounds having a boiling point above 430 °C (vapour pressure less than 10 -9 kPa at 25 °C, e.g. chrysene, benz[ a ]anthracene) can be collected efficiently on the filter at low ambient temperatures (e.g. below 10 °C). In contrast, at higher temperatures (above 30 °C, see also ISO 12884 [1] ), only PAHs having boiling points above 475 °C (vapour pressure less than 10 -10 kPa at 25 °C) are determined quantitatively.