Ambient air — Determination of particle-phase polycyclic aromatic hydrocarbons by high performance liquid chromatography
环境空气——高效液相色谱法测定颗粒相多环芳烃
发布日期:
2005-02-18
ISO 16362:2005规定了定量测定环境空气中低挥发性(颗粒结合)多环芳烃(PAHs)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。采样时间在1小时至24小时之间是可能的。采样体积流速可以在1m/h至4m/h(“低体积采样器”)或10m/h至约90m/h(“中/高体积采样器”)的范围内。在任何情况下,收集过滤器处的线性面速度应在约0.5 m/s和0.9 m/s之间的范围内。
该方法已在长达24小时的采样周期内得到验证。列出了单个PAHs的检测限和重复测量产生的标准偏差。
ISo 16362:2005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)的高效液相色谱法进行分析。可以使用二极管阵列检测器(DAD)。两种检测器类型的组合也是可能的。对总悬浮颗粒物进行采样。
通常,沸点高于430℃的化合物(在25℃下蒸气压小于10-9kPa,例如苯并[a]蒽)可以在低环境温度(例如低于10℃)下有效地收集在过滤器上。相比之下,在较高温度下(高于30°C,另见ISO 12884[1]),仅定量测定沸点高于475°C(25°C时蒸汽压小于10-10 kPa)的多环芳烃。
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.