ISO 13271:2012规定了使用两级虚拟冲击器测定固定排放源PM10和PM2.5质量浓度的标准参考方法。该测量方法特别适用于烟道气中颗粒质量浓度的堆内测量。该方法还可用于在高温或高湿度存在下含有高活性化合物(例如硫、氯、硝酸)的烟气。 国际标准适用于较高的粉尘浓度。粗颗粒被分离到喷嘴中，收集的粗颗粒的反弹和夹带现象可以忽略不计。出于同样的原因，由于气体或排放物中的高浓度引起的伪影是相当有限的。 ISO 13271:2012不适用于粉尘总质量浓度的测定。

ISO 13271:2012 specifies a standard reference method for the determination of PM₁₀ and PM_2,5 mass concentrations at stationary emission sources by use of two-stage virtual impactors. The measurement method is especially suitable for in-stack measurements of particle mass concentrations in flue gas. The method can also be used for flue gas which contains highly reactive compounds (e.g. sulfur, chlorine, nitric acid) at high temperature or in the presence of high humidity. The International Standard is applicable to higher dust concentrations. Coarse particles are separated into the nozzles with negligible rebound and entrainment phenomena of collected coarse particulates. For the same reason, the artefacts due to high concentrations in gases or emissions are quite limited. ISO 13271:2012 is not applicable to the determination of the total mass concentration of dust.